Suit Size Calculator: Jacket + Trouser, One Tool
This suit size calculator handles jacket and trouser sizing in a single workflow — the way bespoke tailors quote a fit. Enter chest, waist, hip, sleeve, inseam, and the tool returns your size with the drop (chest minus waist) decoded. Works for slim, regular, and athletic-fit suits across US, UK, EU sizing. Use the calculator below to get your exact fit in 30 seconds.
How it works
Measure yourself
Take your bust, waist, and hips with a soft tape. See the full measurement guide.
Enter the numbers
Type your measurements into the calculator above. Pick inches or cm — the tool converts both ways.
Get your size
Match the result against the brand's chart and order with confidence.
Men's tops — chest-driven sizing
| Size | US | UK | EU | Chest |
|---|---|---|---|---|
| XS | 34 | 34 | 44 | 32–34" |
| S | 36 | 36 | 46 | 35–37" |
| M | 38–40 | 38–40 | 48–50 | 38–40" |
| L | 41–43 | 41–43 | 52–54 | 41–43" |
| XL | 44–46 | 44–46 | 56–58 | 44–46" |
| XXL | 47–49 | 47–49 | 60–62 | 47–49" |
Frequently Asked Questions
What does '6-inch drop' mean on a suit?
Drop is the chest minus waist measurement of the jacket. A 40R with a 6-inch drop has a 34-inch waist. Athletic builds need 7–8 drop; average builds fit 5–6 drop.
How do I size suit jacket vs trouser separately?
Most off-the-rack suits pair the two by drop assumption. If your waist is bigger than the drop predicts, order separates or have the trouser let out 1–2 inches.
What's the difference between Short, Regular, and Long?
S, R, L are jacket length variants for the same chest size. Short = under 5'8" / 173 cm; Regular = 5'8"–6'0"; Long = 6'0"+.
Should I size up for a slim-fit suit?
Slim fit cuts the body 1–2 inches narrower than regular fit at the same chest spec. If you're between sizes, size up the chest and have the body taken in.
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