The number-one mistake people make when measuring sleeve length is keeping the arm straight. Bend your arm at 90 degrees and measure from the center back of the neck to the wrist bone. Here is the professional tailor method in 3 steps.
Sleeve length is the distance measured from the center back of your neck (the prominent C7 vertebra), across the top of your shoulder, down the outside of your arm, to the wrist bone. This is the standard measurement used for dress shirts and is sometimes called "full sleeve length" or "shirt sleeve length."
There is also a shorter measurement called arm length (or "jacket sleeve length"), which only measures from the shoulder seam down to the wrist. Understanding the difference between these two is essential for getting the right fit in both shirts and jackets.
The critical detail most people get wrong: your arm must be bent at a 90-degree angle when measuring. A straight arm gives a measurement that is too short, because when you naturally move throughout the day — reaching for a coffee, shaking hands, driving — your sleeves ride up. The bend accounts for this movement.
Measured from the center back of your neck across the shoulder and down the arm to the wrist bone. This is what dress shirt sizes refer to (e.g., neck 16, sleeve 34).
Measured from the shoulder seam (where the shoulder bone ends) straight down the outside of the arm to the wrist bone. This is what tailors use when cutting jacket and blazer sleeves.
How they relate: Full sleeve length = arm length + the distance from center back of neck to shoulder point. That back-and-shoulder portion is typically 16" to 20" depending on your build.
Once you have a shirt or jacket, use this two-part test to verify sleeve length is correct:
Arms at your sides: The shirt cuff should hit right at the wrist bone. It should not cover your hand or stop short of the wrist.
Arms bent at 90 degrees: The cuff should not ride up past the wrist. If it pulls back to mid-forearm, the sleeve is too short.
For jackets specifically: 1/4" to 1/2" of shirt cuff should remain visible below the jacket sleeve in both positions.
Stand up straight in a thin shirt. Have your helper find the prominent bone at the center back of your neck — this is your C7 vertebra. You can feel it by tilting your head forward; it is the bone that sticks out the most.
Now bend your dominant arm at a 90-degree angle, with your elbow at your side and your forearm pointing straight forward, as if you are about to shake someone's hand. This bent position is critical for an accurate measurement.
Why bend? When your arm is straight, the sleeve measurement comes out 1/2" to 1" shorter than needed. During normal wear, every time you bend your arm — reaching, eating, driving — a too-short sleeve pulls up and exposes too much wrist. The 90-degree bend accounts for real-world movement.
Have your helper place the end of the tape (0") at the center back of your neck, right on that prominent C7 vertebra. Run the tape across the top of your shoulder, keeping it flat against your body, to the shoulder point — the bony edge where your shoulder ends and your arm begins.
Note this midpoint number. For most men, the distance from center back to shoulder point is around 17" to 19" per side. This "half-back" measurement is useful on its own for verifying shoulder fit.
Without lifting the tape, continue from the shoulder point down the outside of your bent arm. Follow the natural curve over the elbow, keeping the tape flat against your arm the entire way. End at the wrist bone — the bony protrusion on the outside (pinky side) of your wrist.
The number at the wrist bone is your full sleeve length. Record it. Then repeat on the other arm — most people have a dominant arm that is 1/4" to 1/2" longer.
Pro tip: Measure each arm 2-3 times and average the results. For off-the-rack shirts, use your longer arm's measurement. For custom shirts from Nathan Tailors, we cut each sleeve individually.
Use this reference table to see if your measurement falls within the typical range. These are full sleeve length measurements (center back of neck to wrist), which is what dress shirt sizes use.
| Height | Sleeve Length (inches) | Sleeve Length (cm) | Common Shirt Size |
|---|---|---|---|
| 5'6" | 32" - 33" | 81 - 84 cm | 32/33 |
| 5'8" | 33" - 34" | 84 - 86 cm | 34/35 |
| 5'10" | 34" - 35" | 86 - 89 cm | 34/35 |
| 6'0" | 35" - 36" | 89 - 91 cm | 36/37 |
| 6'2" | 36" - 37" | 91 - 94 cm | 36/37 |
| 6'4" | 37" - 38" | 94 - 97 cm | 38/39 |
These are averages. Arm length varies significantly based on body proportions — two people of the same height can have sleeve lengths that differ by 2 inches or more. Always measure yourself.
Understanding the difference between these two measurements is essential for a polished look when wearing a suit.
When ordering a custom suit from Nathan Tailors, we measure both shirt and jacket sleeve lengths independently to ensure this perfect relationship between the two garments.
This is the most common mistake. A straight arm gives a measurement 1/2" to 1" too short. Always bend the arm at 90 degrees. When you wear the shirt, every time you bend your arm the sleeve will pull up and expose too much wrist.
The endpoint is the wrist bone (the bony bump on the outside of your wrist), not the base of your thumb or the middle of your hand. Measuring too far gives sleeves that cover your hands.
For shirt sleeve length, you must start at the center back of the neck — not the shoulder. Starting at the shoulder gives you arm length (useful for jackets) but not the full sleeve measurement that shirt sizes use.
Most people have arms that differ by 1/4" to 1/2". If you only measure one arm and it happens to be the shorter one, your dominant arm's sleeve will always feel too tight and ride up.
Bend your arm at a 90-degree angle. Have a helper place the measuring tape at the center back of your neck (the prominent C7 vertebra), run it across the top of your shoulder to the shoulder point, then down the outside of your bent arm to the wrist bone. This measurement — from center back of neck to wrist — is your full sleeve length, which is what dress shirt sizes use.
The average sleeve length for men ranges from 32 to 37 inches depending on height. A man who is 5'10" typically measures 34-35 inches. The most common off-the-rack dress shirt sleeve sizes are 32/33, 34/35, and 36/37. These are full sleeve measurements from center back of neck to wrist.
Shirt sleeve length is measured from the center back of the neck, across the shoulder, and down to the wrist bone (32-37 inches typically). Jacket sleeve length is measured from the shoulder seam only, straight down to the wrist (23-26 inches typically). The difference is the distance across your upper back and shoulder, which is typically 16-20 inches per side.
The ideal amount of shirt cuff visible below a jacket sleeve is 1/4 inch to 1/2 inch (about 0.5 to 1.25 cm). This small reveal of cuff is a classic sign of proper fit. No cuff showing means the shirt sleeves are too short or the jacket sleeves are too long. More than 1/2 inch means the opposite. Custom tailoring ensures this relationship is precise.
This is completely normal. Most people have a dominant arm that is 1/4 to 1/2 inch longer. For off-the-rack shirts, measure your longer arm and use that measurement — it is easier to adjust a slightly long sleeve than to deal with one that is too short. For custom tailoring at Nathan Tailors, we measure each arm individually and cut each sleeve to its own length for a perfect fit on both sides.
Off-the-rack dress shirts group sleeve lengths in pairs: 32/33, 34/35, 36/37. If your measurement falls between (for example, 33.5 inches), round up to the next size (34/35). Sleeves that are slightly long can be shortened by a tailor, but sleeves that are too short cannot be lengthened. For a perfect fit without compromise, custom-made shirts from Nathan Tailors are cut to your exact measurement — no rounding needed.
Now that you know your sleeve length, save your measurements with Nathan Tailors. We cut each sleeve individually to your exact measurement — no more between-sizes compromises. Custom shirts and suits tailored in Hoi An, Vietnam.
Save Your Sleeve Measurements
Custom shirts and suits from Nathan Tailors, Hoi An