A B♭ tenor trombone weighs about three pounds. That makes it the lightest instrument in the low brass row — lighter than a tenor horn, lighter than a baritone, a third the weight of a euphonium. If it feels heavy, the weight is not the reason, and the rest of this page is about what actually is.
3 to 3½ pounds for a straight B♭ tenor, 4 to 4½ with an F attachment, 5 to 6 for a bass
John Packer publishes a separate weight without case for every trombone it builds, which is the only complete family measured one way by one company. Its student B♭ tenor is 3 lb 1 oz, its large-bore B♭/F tenor 4 lb 1 oz, its two-valve bass 5 lb. Wessex lands in the same place from the other end. A plastic pBone is 1.8 lb. And the case around any of them weighs 5 to 9½ lb on its own.
What the makers actually publish
Almost no brass maker publishes an instrument weight. Yamaha gives you bore to three decimals, bell diameter, leadpipe alloy, slide materials and the mouthpiece in the box, and no mass for any trombone it builds. Conn-Selmer publishes none for Bach, Conn or King. Neither does Getzen, Shires, Rath, Eastman or Schagerl. Two companies do, and one of them does it properly.
John Packer puts a Weights & Dimensions block on every product page carrying three separate numbers: weight without case, weight with case, and boxed weight. That distinction is the whole reason this page can be accurate. Every figure you will find on a retail listing is one of the last two — a courier’s number that counts the case, the mouthpiece, the carton and the packing — and quoting it is how the internet ended up telling people a trombone weighs eight pounds.
| Instrument | Model | Bore / bell | Weight, no case |
|---|---|---|---|
| B♭ tenor, plastic | pBone | .500″ | 1.8 lb · 800 g |
| E♭ alto | John Packer JP236 Rath | .481″ / 7″ | 2 lb 7 oz |
| B♭ tenor, student | John Packer JP031 | .500″ / 8″ | 3 lb 1 oz |
| B♭ tenor, small bore | John Packer JP230 Rath | .500″ / 7½″ | 3 lb 3 oz |
| B♭ tenor, dual bore | John Packer JP131R | .500/.525″ / 8″ | 3 lb 3 oz |
| B♭ tenor, large bore | John Packer JP132R | .547″ / 8½″ | 3 lb 8 oz |
| Marching trombone | Wessex FB124 Flugabone | — | 3.97 lb · 1.8 kg |
| B♭/F tenor, large bore | John Packer JP133LR | .547″ / 8½″ | 4 lb 1 oz |
| B♭/F tenor, medium large | John Packer JP331 Rath | .525″ / 8″ | 4 lb 3 oz |
| B♭/F tenor, large bore | John Packer JP332 Rath | .547″ | 4 lb 8 oz |
| Valve trombone | John Packer JP135 | .484″ | 4 lb 8 oz |
| Bass, single trigger | John Packer JP233 Rath | — | 4 lb 10 oz |
| Bass, two valves | John Packer JP232 | .563″ / 9½″ | 5 lb |
| Bass, professional | Wessex PBF565P | — | 5.1 lb · 2.35 kg |
| Bass, B♭/F/G♭ | John Packer JP333 Rath | — | 5 lb 12 oz |
The two makers corroborate each other where they overlap. Wessex gives 5.1 lb for its professional double-valve bass and John Packer gives 5 lb for its two-valve bass — two companies, two factories, one and a half ounces apart. That is the check that turns a single maker’s spec sheet into a number you can rely on.
Read down the last column and the range is narrower than the reputation. From the smallest jazz tenor to a professional bass with two valves is 3 lb to 5¾ lb — less than three pounds of spread across the entire family. The commonly repeated “three to eight pounds” is right at the bottom and roughly double at the top.
There is a row on the spec sheet marked Weight, and it is not the weight
This is worth knowing before you go looking. Yamaha’s trombone specification pages do carry a field called Weight. On the YBL-620G bass it reads Standard. On the YSL-897Z it reads Light. On the student YSL-354 the row is not there at all.
Those are descriptions of the bell — how thick the brass is where it flares. A lightweight bell is thinner metal, it responds faster and it breaks up sooner at volume, and it is a tone specification rather than a number of pounds. Nothing on the sheet tells you what the instrument weighs. Two trombones both marked Standard can differ by a pound, and a Light one is not meaningfully lighter to hold.
The F attachment costs nine ounces
John Packer builds two trombones that are identical on every published line except one. The JP132R and the JP133LR are both .547″ large bore, both an 8½″ rose brass bell, both a yellow brass body, both one water key. The JP133LR has a rotary valve and a coil of F tubing; the JP132R does not.
3 lb 8 oz against 4 lb 1 oz. Nine ounces — about 255 grams — for the valve, its linkage and the wrap behind the bell. The same step in the Rath line costs a little more, a pound, because the F-attachment model also has a bigger bore and a bigger bell. Nine ounces is the clean answer, because it is the only pair where nothing else changes.
Here is the part that catches people out. That heavier trombone is the one a smaller player should be looking at.
Reach is the real limit, not weight
Yamaha states the number outright in its own guide to the instrument: the furthest slide position on a tenor trombone sits at around 60 cm — roughly 23½ inches from the slide’s home position — and that, in Yamaha’s words, is “right around the maximum distance that the average adult male can extend his arm.” Seventh position is at the end of an adult arm. It is not at the end of a twelve-year-old’s.
Three pounds does not stop anybody. Twenty-three and a half inches does, and it stops them in a specific way: the low notes at the bottom of the horn are exactly the ones that need the longest reach. A student who cannot get to sixth and seventh position cannot play E and low B♭ in tune, which is most of what a third trombone part is made of.
Yamaha gives two fixes. The cheap one is to tie a length of string to the slide so it can be pulled back from a position the arm cannot reach — a maker recommending a piece of string, which tells you how ordinary the problem is. The real one is the F attachment. Its whole purpose is to put the low range under a thumb lever instead of an arm: with the trigger down, the notes that lived in sixth and seventh come back within easy reach, and Yamaha says plainly that this “has made it possible for even smaller people to play the trombone.”
So the nine ounces buys a shorter reach. On any page that treats weight as the obstacle that is a contradiction; on the instrument it is simply the answer. The one caveat is Yamaha’s own: a large bore B♭/F tenor takes a great deal of air and it recommends those for advanced players only. A beginner who needs the trigger wants a medium or medium-large bore, which is also the lighter of the two.
Three pounds at arm’s length is not three pounds
Every other instrument in the low brass row rests on something. A baritone sits against your chest, a euphonium on your thigh, a tuba in your lap or on a stand. A trombone rests on nothing at all.
Yamaha describes the grip exactly: the instrument is held to the lips with the left hand, and the right hand grips the slide brace and moves it. The right hand is not helping. It cannot help — it is busy, and it is holding a part that is not attached. The outer slide is simply inserted, with nothing retaining it, so that it runs freely; let go and it drops off the end. That is a deliberate design choice and it means the entire mass of the instrument, permanently, hangs on one hand.
And it hangs a long way out. The bell sits forward of the shoulder and the slide reaches out past that, so what the left arm is actually resisting is a lever, not a weight. Hold three pounds against your chest and you can do it all afternoon; hold three pounds at half an arm’s length, with your shoulder raised so the mouthpiece meets your lips, and twenty minutes is a workout. That is the ache trombone players describe, and it is why the answer is never a lighter instrument.
Two things genuinely fix it. Somewhere to put the horn down between numbers, so a two-hour rehearsal is not two hours of holding. And a technique fix rather than a purchase: the weight belongs on the ledge between your left thumb and forefinger with the arm hanging under it, not gripped in a fist with the wrist cocked. A teacher can correct that in five minutes and it is worth more than anything on this page.
The case weighs more than the trombone
This is where the eight-pound figure comes from, and it is the honest answer to what you are carrying to school.
John Packer’s student JP031 is 3 lb 1 oz on its own and 12 lb 5 oz in its case. The case is three times the instrument. The other two makers who publish case weights agree on the range:
| Case or bag | Maker | Weight |
|---|---|---|
| Tenor trombone gig bag | BAM BAMTECH | 4 lb 6 oz |
| Lightweight beginner case | Gator Largo GBB-TROMBONE | 5 lb |
| Tenor trombone case | BAM Classic | 6 lb |
| Lightweight EPS case, F attachment | Gator Adagio GL-TROMBONE-F23 | 6.4 lb |
| Bass trombone case | BAM Classic | 8 lb 3 oz |
| Pro gig bag | Gator Allegro GBPB-TROMBONE | 9 lb |
| Tenor trombone case | BAM Conservatoire | 9 lb 10 oz |
Nothing in that table weighs less than the instrument it protects, and the heaviest weighs three times as much. Two things follow. If the walk from the parking lot is the complaint, the case is what to change, and swapping a rigid case for a padded bag is a five-pound saving against three ounces anywhere on the horn. And do not read a case weight as a trombone weight, which is what a shipping figure invites you to do.
The trade is real, though. A soft bag saves the weight and gives up the protection, and a trombone slide is the single most damage-prone thing in a school band room — a dent in an inner slide is not a cosmetic problem, it is a horn that no longer plays. A bag is right for a player who carries the instrument themselves. A rigid case is right for one whose horn travels in the bottom of a bus.
How big is a trombone?
It is a three-foot package holding nine feet of tubing, and it comes apart into two pieces to travel.
Yamaha gives the figure: straighten out a typical tenor trombone and it runs 270 cm from mouthpiece to bell rim — 8 ft 10 in. Push the slide out to seventh and the air path becomes about 380 cm, or 12 ft 6 in. Everything the slide does is that: it is a variable length of pipe, and the seven positions are seven lengths.
No maker publishes an assembled length, but the cases give it away. Gator’s trombone cases are 34¾ to 35 inches inside and 35½ to 38½ inches outside, and John Packer ships its trombones in a 38-inch box. The instrument travels as two pieces — the slide separates from the bell section — and each of them is a little under three feet. That length, not the weight, is what decides whether it fits in a locker, a footwell or an overhead bin.
Bell diameter is the other dimension people quote, and it is a smaller range than the internet suggests. Across John Packer’s line it runs 7″ on an alto, 7½″ on a small-bore jazz tenor, 8″ on a student horn, 8½″ on a large-bore tenor and 9½″ on a bass. Yamaha’s student YSL-354 is 8″ and its YBL-620G bass is 9½″ — the same span. Bore runs .481″ on an alto to .563″ on a bass, and Yamaha’s summary of what that does is worth having: a smaller bore takes less air and gives a mellower, easier sound, a larger one takes more air and gives a bigger, louder one.
One more thing about the slide, since it explains the care instructions. There are no position markers on it. Yamaha’s comparison is to a violin rather than a guitar — the positions are learned by feel, and they are learned on a mechanism that has to run frictionlessly for the feel to be reliable. That is the case for the stand and against laying the horn across two chairs.
Where the trombone sits in the brass section
| Instrument | Weight | How it is carried |
|---|---|---|
| B♭ tenor trombone | 3–3½ lb | One hand, at arm’s length |
| B♭/F tenor trombone | 4–4½ lb | One hand, at arm’s length |
| E♭ tenor (alto) horn | 4 lb 10 oz | Against the body |
| Bass trombone | 5–6 lb | One hand, at arm’s length |
| B♭ baritone horn | 5½–6 lb | Against the body |
| Euphonium | 10½ lb | In the lap |
| BB♭ tuba | 23–26 lb | In the lap or on a stand |
The tenor trombone is the lightest thing on that list and the only one held out in front of the player. It is a pound and a half under a baritone and a third the weight of a euphonium, and it is the one that makes your arm ache. The column that explains the discomfort is the third one, not the second.
What actually helps
Four things, and most readers need one of them. A seated player in a school band needs somewhere to put the horn down. Someone whose walk to school is the problem needs a lighter bag. A child who genuinely cannot manage a brass instrument needs a plastic one. And a player who has decided the answer is a better horn should know that a good brass tenor is barely heavier than the plastic one it replaces.
Somewhere to put it down
K&M 14985 Trombone Stand
- Folding three-leg base, peg into the bell
- Fits tenor and bass trombones, and marching baritones
- K&M’s own long-standing design, made in Germany
- Collapses to sit inside the bell for transport
- ~$50
A trombone that is not in your hand has to go somewhere, and the places players actually use are all bad: across two chairs, propped in a corner, on the floor beside the stand. The slide is the part that gets hit, and it is the part that has to run perfectly — a dent in an inner slide is a repair bill, not a scratch.
A stand is the difference between a two-hour rehearsal spent holding the instrument and one spent playing it. That matters more here than on any other brass instrument, because the trombone is the only one that cannot simply rest in your lap during forty bars of rest. This is the same stand we point baritone players at, for the same reason: it is the design everyone else copies, it folds flat, and it costs about a sixth of the cheapest slide repair.
- Takes the load off the left arm during rests
- Keeps the slide off the floor, which is where the damage happens
- Folds down small enough to travel in the bell
- Also holds a marching baritone, so it survives an instrument change
- Dearer than the unbranded stands next to it
- One more thing to carry and set up
- Wants a flat floor — it is not a riser stand
If carrying it is the problem
Protec C239X Explorer Series Tenor Trombone Gig Bag
- Padded soft bag for straight tenor trombones
- Backpack straps and a shoulder strap
- Full-length sheet music pocket
- ~$105
The instrument is three pounds and the rigid case is five to nine and a half. If the complaint is the walk rather than the playing, this is the only change on the page that moves real weight, and it moves several times more of it than anything you could do to the horn.
A padded bag also carries better than it weighs, because backpack straps put the load on two shoulders instead of one hand. The honest limit is protection: this is right for a student who carries their own instrument between home, school and rehearsal, and wrong for one whose trombone goes in the hold of a bus under everyone else’s. If that is your situation, keep the hard case and buy the stand instead.
- Saves several pounds against a rigid case
- Backpack straps spread the load across both shoulders
- Sheet music pocket removes a second bag
- Slim enough to sit in a footwell or a locker
- Padding, not armor — a hard knock reaches the slide
- Straight tenors only; an F attachment needs the larger bag
- Costs more than some hard cases
If the player is genuinely too small for a brass one
pBone B♭ Plastic Trombone
- 1.8 lb · 800 g, published by pBone
- .500″ bore and an 8″ bell — the same as a student brass tenor
- ABS body, glass-fiber slide, two plastic mouthpieces
- Carrying bag included
- ~$200
This is the only genuine answer to “it is too heavy,” and it is a real instrument rather than a toy. It is pitched in B♭, it takes standard mouthpieces, and its bore is the same .500″ as John Packer’s student brass tenor — so it is a like-for-like swap that removes 40% of the weight and, more to the point, 40% of the load on a small arm held out in front.
What you give up is tone and slide feel. A plastic slide never runs quite like nickel silver on chrome, and the sound is thinner and less centered than brass at the same money. Against that, it does not dent, it does not care about being dropped, and a seven-year-old can hold it. If the alternative is a child giving up on the instrument, the trade is easy; if the alternative is an adult who simply finds a long rehearsal tiring, buy the stand.
- Under two pounds, from the maker’s own published figure
- Standard B♭ pitch and .500″ bore, so nothing has to be relearned
- Effectively indestructible, which suits a school band room
- Takes an ordinary small-shank mouthpiece
- Thinner, less focused sound than brass
- Slide action does not match a good brass slide
- Costs about what a decent used brass tenor does
- Does not solve the reach problem — the slide is the same length
If you are replacing the horn anyway
Jean Paul TB-400 Straight B♭ Tenor Trombone
- Straight B♭ tenor, no F attachment
- Case and 12C mouthpiece included
- One-year warranty to the original purchaser, dated and published
- Jean Paul stocks spare slides, slide locks and water keys for it
- ~$500
The point of putting this here is the arithmetic. A brass student tenor is about three pounds; the plastic one is 1.8. The whole weight saving available anywhere in this category is a pound and a quarter, and it costs you the tone of the instrument. Anyone weighing a plastic trombone against a brass one on grounds of weight should know how small the gap actually is.
Jean Paul is the budget brand this site keeps coming back to for one unglamorous reason: it publishes what happens when something breaks. Its warranty is a dated document — one year, original purchaser, authorized purchase required — and it names the remedy rather than gesturing at one: send parts, or approve a local repair shop and pay that shop directly. It also sells replacement parts for its own trombone, a slide, a slide lock and a water key assembly, each listed with a price. Most brands at this money publish none of that. The TB-400 is a straight horn, which means no trigger and no help with the reach, so a short-armed player should be looking at an F-attachment model instead and accepting the extra nine ounces.
- Around three pounds — barely heavier than plastic
- Supported by the maker, with spare parts published and priced
- Case and mouthpiece in the box
- No premium over the maker’s own list price
- No F attachment, so seventh position is still seventh position
- Two and a half times the price of the plastic one
- Dents like any brass instrument
FAQs
How much does a trombone weigh in pounds?
A straight B♭ tenor trombone weighs 3 to 3½ pounds. John Packer, which publishes a weight without the case for every model it builds, gives 3 lb 1 oz for its student tenor and 3 lb 8 oz for a large-bore one. Add an F attachment and it becomes 4 to 4½ lb; a bass trombone is 5 to 6 lb; an E♭ alto is about 2½ lb.
How much does a trombone weigh in its case?
About 12 pounds. John Packer gives 12 lb 5 oz for a student tenor in its supplied case against 3 lb 1 oz for the instrument alone. Case makers who publish weights put a trombone case at 5 to 9½ lb on its own — BAM’s tenor gig bag is 4 lb 6 oz and its Conservatoire case 9 lb 10 oz — so the case is always the heavier half of what you carry.
Is a trombone heavy for a beginner?
No — it is the lightest instrument in the low brass section, lighter than a tenor horn or a baritone. What limits a young beginner is reach rather than weight. Yamaha puts the furthest slide position on a tenor trombone at around 60 cm, about the full stretch of an adult arm, so a small player cannot get to sixth and seventh position and cannot play the lowest notes in tune.
Does an F attachment make a trombone much heavier?
About nine ounces. John Packer’s JP132R and JP133LR are identical — same .547″ bore, same 8½″ rose brass bell, same body — except for the valve, and they weigh 3 lb 8 oz and 4 lb 1 oz. It is worth the nine ounces for a shorter player, because the trigger brings the low notes back out of the positions their arm cannot reach.
Why does my trombone feel heavy if it only weighs three pounds?
Because all of it hangs on one hand, held out in front of you. The left hand carries the instrument and the right hand cannot help — it is moving the slide, which is not even fastened to the horn. Three pounds at half an arm’s length behaves like a lever rather than a weight. A stand to rest it on between numbers and a check on your left-hand grip help far more than a lighter instrument would.
How long is a trombone?
It travels in two pieces, each a little under three feet, which is why trombone cases run 35½ to 38½ inches long. Straightened out, the tubing of a tenor trombone measures 270 cm (8 ft 10 in) from mouthpiece to bell, and about 380 cm (12 ft 6 in) with the slide fully extended.
How much does a plastic trombone weigh?
1.8 pounds, or 800 grams, which is pBone’s own published figure for its B♭ tenor. Its smaller pBone mini is 1.1 lb. That is around 40% lighter than a brass student tenor, on the same .500″ bore — the largest weight saving available in the instrument, and the only one worth calling significant.
Related
How much does a trombone cost? — what the three, four and five-pound instruments above actually sell for.
How much does a baritone weigh? — the next instrument along the row, and the one people confuse with a euphonium.
Brass instruments explained — where the trombone sits in the family, and why it is the only one with a slide.
Orchestra vs. band — how many trombone seats each one has, and what they are asked to play.