Coat Size Calculator: Overcoat, Trench and Peacoat Size and Length
Free tool · Updated October 2, 2026 · By CouponTalk
Your result
Enter your measurements to see your result.
Quick answer
A coat goes over everything, so size it by chest plus layers: about 1 inch over a shirt, 2 inches over a sweater and 3 inches over a suit jacket. Men's coats use chest numbers: a 39-inch chest over a suit needs a 42 coat. For length, at 175 cm a knee-length overcoat is about 41 inches from the back of the collar, and a peacoat about 30 inches.
How to measure
- Measure your chest or bust over a shirt.
- Choose what you will wear under the coat.
- Add your height and the length you want.
Coat & Overcoat Size Chart
| Length | Ends at | Length at 165 cm | At 175 cm | At 185 cm |
|---|---|---|---|---|
| Hip (peacoat) | Below the seat | 28" | 30" | 31" |
| Mid-thigh | Mid-thigh | 32" | 34" | 36" |
| Knee (overcoat) | At the knee | 38" | 41" | 43" |
| Long trench | Below the knee | 43" | 45" | 48" |
Coat lengths are estimates from height. Check the "length" on the product page.
Frequently asked questions
Should a coat be one size bigger than a blazer?
Usually yes, if you plan to wear it over a blazer or suit.
How long should an overcoat be?
A classic overcoat ends just above or at the knee. Shorter people suit coats that end mid-thigh.
Where should coat sleeves end?
About half an inch past your shirt cuff, so they cover the blazer sleeve.
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China & Asian Size to Indian Size ConverterHeight + bust to 165/88A and letter
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