Key points:

  1. Shirt sizing is indexed on neck circumference, never on arm length: that is the structural cause of the problem.
  2. At Figaret, the extra long sleeve version adds 4 cm to the sleeve and 5 cm to the back.
  3. Sizing up the collar to gain sleeve length is a false solution: the length gain stays small, at the cost of a shirt that is loose everywhere.
  4. Not every brand publishes the gap in centimetres: measuring a shirt that fits remains the safest reference.

Why collar size says nothing about sleeve length

A men’s shirt is ordered by neck circumference: 37, 38, 39, up to 45 or more. That measurement describes the circumference of the neck, in centimetres. It carries no information about arm length.

Brand size charts therefore apply an average sleeve length per collar size, calculated on an average build.

The problem with long-limbed builds

Two men can share exactly the same collar size and differ by several centimetres in arm span. The standard grid does not cover that case.

The outcome is mechanical: the cuff rides up the forearm as soon as the arm bends, and disappears under the jacket sleeve instead of showing slightly as convention requires.

The test for sleeves that are too short

Three checks are enough, with the shirt worn and the cuff buttoned.

  1. Arm at the side: the cuff should fall at the base of the thumb, on the wrist bone, not above it.
  2. Arm extended forward: the sleeve should not pull back noticeably. Significant pull-back points to a misplaced armhole as much as to a short sleeve.
  3. Arm bent at 90 degrees: this is the decisive test. If the cuff rides clearly up the forearm, the sleeve is too short.

The third test is the one most fitting-room checks skip, because they are done with the arms hanging in front of a mirror. That is precisely the position in which the fault stays invisible.

What extra long sleeve lines actually deliver

Several shirtmakers offer a dedicated line, often identified by a suffix in the size. The important point, and a rarely explicit one, is the actual gap in centimetres against the standard model.

Published gaps

ElementStandard shirtFigaret extra long sleeve version
Sleeve lengthChart reference+ 4 cm
Back lengthChart reference+ 5 cm
Neck circumferenceUnchangedUnchanged
ChestUnchangedUnchanged

Figaret documents that gap precisely on its dedicated collection: extra long sleeve shirts have “4 cm more on the sleeve and 5 cm more on the back”, identified by the letter L attached to the collar size, as in 43L.

The added back length matters as much as the sleeve. A long-limbed build needs both: without the extra back length, the shirt pulls out of the trousers as soon as the torso bends, and the sleeve gain serves no purpose.

What the dedicated line does not change

Neck circumference and chest remain those of the size ordered. That is the whole point of the approach, and what separates it from simply sizing up.

Why sizing up the collar is a false solution

The most common reflex is to take one collar size up to gain sleeve length. The arithmetic does not hold.

Moving up one collar size adds little sleeve length, while the collar, the chest and the shoulder seam all widen.

In other words: a small length gain, in exchange for a shirt that floats at the torso and drops at the shoulder. On a fitted shirt, the effect is immediately visible.

The fabrics that forgive the least

A slightly short sleeve shows more on some fabrics than others.

  • Poplin and pinpoint: tight weave, crisp hand, the cuff holds its position and the fault is obvious.
  • Oxford and basketweave: softer grain, the sleeve relaxes slightly with wear, which softens a slight gap without correcting it.
  • Linen: a fabric that moves a great deal, creases and shrinks in the wash. On a long-limbed build, it is safer to allow margin at purchase. The comparison between linen or cotton shirts covers these behavioural differences.

Shrinkage at the first wash deserves particular attention: a cotton that has not been pre-shrunk can shorten at the first wash, which is enough to turn a borderline sleeve into a short one. The cotton shirt care guide sets out the temperatures that limit this.

Collars and formal occasions

On formal dress, the shirt cuff should show beyond the jacket sleeve. This is a rule of proportion rather than an affectation: it marks the boundary between jacket and hand, and structures the silhouette.

A sleeve that is too short makes that impossible, whatever the rest of the outfit. For a ceremony, sleeve length is therefore settled before colour or collar: the guide on what shirt to wear for a wedding covers the remaining criteria once that constraint is cleared.

Collars without points, such as the mandarin collar, change nothing about sleeve length but alter the overall reading of the silhouette, which they visually lengthen.

Where to find extra long sleeve shirts

Several shirtmakers maintain a dedicated line, often identified by a suffix in the size.

In France, Figaret offers the version documented above. Café Coton also devotes a collection to extra long sleeves: 18 shirts in October 2026, almost all fitted, in poplin, pinpoint, herringbone, basketweave or denim, plain or striped, across collar sizes 37 to 42.

The point to watch at purchase is the same everywhere: check that the gap in centimetres is stated. Without it, the only reliable method is to measure a shirt that fits, from the centre back to the end of the cuff, and compare that figure with the seller’s chart.

Frequently asked questions

What sleeve length does a tall man need?

The difference depends on the brand. Figaret states 4 cm more on the sleeve and 5 cm more on the back for its extra long sleeve shirts. To find your own length, measure a shirt that fits well, from the centre back to the end of the cuff, and compare that figure with the seller’s chart.

How do you know if shirt sleeves are too short?

Test with the arm extended forward, then bent at 90 degrees. The cuff should stay at the wrist bone in both positions. If it rides up the forearm when the arm bends, the sleeve is too short, even when the collar and chest fit correctly.

Why are the sleeves too short when the collar size is right?

Shirt sizing is indexed on neck circumference, never on arm length. Two men with the same collar size can differ by several centimetres in arm span. Standard grids apply an average sleeve length per collar size, which systematically penalises long-limbed builds.

Should you size up the collar to gain sleeve length?

No. Going up one collar size adds little sleeve length, while widening the collar, the shoulders and the chest. The result is a shirt that is loose everywhere for a small length gain. A dedicated extra long sleeve line answers the need far better.

Can the sleeves of an existing shirt be lengthened?

Rarely. A shirt sleeve carries no meaningful fabric reserve at the cuff, unlike trousers whose hem can be let down. The feasible alteration is the reverse: shortening a sleeve that is too long, a common and inexpensive operation.