Suit / Jacket Size Calculator
Convert chest, waist, and height to suit sizes in US, UK, and EU.
Includes short, regular, long, and extra-long fit recommendations for men.
Suit sizing is based primarily on the chest measurement, which determines the jacket size. Additional measurements — waist, hips, height — determine the “cut” designation: Regular, Short, Long, or Extra Long. Getting the chest measurement right is the single most important step, because jackets can be altered at the waist and sleeve, but the chest and shoulders cannot be changed significantly.
How to measure for a suit:
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Chest: Wrap the tape measure around the fullest part of your chest, under your armpits and across your shoulder blades. Keep the tape horizontal and snug but not compressing. This is your chest measurement.
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Waist: Measure around your natural waist (usually 1 inch above your belly button) — this helps determine drop and alterations needed.
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Height: Determines jacket length designation (Short, Regular, Long, Extra Long).
Chest measurement to suit size (US/UK):
US/UK Size = Chest inches (rounded to nearest even number)
Metric conversion:
US/UK Size ≈ Chest (cm) ÷ 2.54, rounded to nearest even
European / Italian size:
EU Size = US/UK Size + 10
Comprehensive size chart:
| Chest (in) | Chest (cm) | US / UK | EU | Height for Regular |
|---|---|---|---|---|
| 34 | 86 | 34 | 44 | 5'7"–5'9" (170–175 cm) |
| 36 | 91 | 36 | 46 | 5'7"–5'10" (170–178 cm) |
| 38 | 97 | 38 | 48 | 5'8"–5'11" (173–180 cm) |
| 40 | 102 | 40 | 50 | 5'9"–6'0" (175–183 cm) |
| 42 | 107 | 42 | 52 | 5'10"–6'1" (178–185 cm) |
| 44 | 112 | 44 | 54 | 5'11"–6'2" (180–188 cm) |
| 46 | 117 | 46 | 56 | 6'0"–6'3" (183–190 cm) |
| 48 | 122 | 48 | 58 | 6'1"–6'4" (185–193 cm) |
| 50 | 127 | 50 | 60 | 6'2"–6'5" (188–196 cm) |
Height and jacket length designations:
| Label | US Height | EU Height |
|---|---|---|
| Short (S) | 5'4"–5'7" (163–170 cm) | Height 164–170 cm |
| Regular (R) | 5'7"–6'0" (170–183 cm) | Height 171–182 cm |
| Long (L) | 6'0"–6'3" (183–190 cm) | Height 183–191 cm |
| Extra Long (XL) | 6'3"+ (190+ cm) | Height 192+ cm |
Drop — chest minus waist:
| Drop | Fit Style | Description |
|---|---|---|
| 6" drop | Classic fit | Most common; generous chest-to-waist ratio |
| 7" drop | Modern / Slim fit | Slightly more tapered waist |
| 8"+ drop | Slim / Athletic fit | Pronounced taper; athletic builds |
Worked example: Man’s chest measurement: 42 inches, height: 5'11", waist: 36 inches
- US Jacket size: 42 Regular
- EU size: 52
- Drop = 42 − 36 = 6" → Classic fit
Trouser sizing: Suit trouser waist typically runs 6 inches smaller than jacket chest in a matched suit (42R jacket comes with 36" trousers). Trousers can be ordered separately in your exact waist and inseam if the matched size doesn’t fit.