Coat Size Calculator

The Ultimate Coat Size Tool

Coat Size Calculator 🧥

Find your perfect coat size in every country. Convert men's, women's & kids coat sizes across US, UK, EU, FR, IT, JP, KR & CN. Winter coats, overcoats, trench coats & parkas. Enter your chest measurement for instant international sizing.

Coats need room for layering — your coat size is typically one size larger than your suit jacket size. A US 42 suit jacket wears a US 44 coat (or L/XL), a UK 44 coat, an EU 54 coat, a JP 3L-4L coat, a KR 110 coat, and a CN 185/104A coat. This complete coat size calculator covers winter coats, overcoats, trench coats, and parkas for men, women, and children.

🔒 plussizeplus.com

🧥 International Coat Size Calculator

Enter your body measurements and layering preference to instantly see your correct coat size in all major international systems.

Men's Coats & Overcoats International Size Chart

Men's coats are sized larger than suit jackets to accommodate layering. The chart below provides the complete international conversion for coats designed to be worn over sweaters or suit jackets.

Coat Size	🇺🇸 US/UK	🇪🇺 EU	🇫🇷 FR	🇮🇹 IT	🇩🇪 DE	🇯🇵 JP	🇰🇷 KR	🇨🇳 CN	Chest (cm)	Worn Over
S	36-38	46-48	46-48	46-48	44-46	M-L	95	170/92A	92-100	T-shirt / thin sweater
M	38-40	48-50	48-50	48-50	46-48	L-LL	100	175/96A	100-108	Shirt + sweater
L	42-44	52-54	52-54	52-54	50-52	LL-3L	105	180/100A	108-114	Suit jacket / thick sweater
XL	46-48	56-58	56-58	56-58	54-56	3L-4L	110	185/104A	114-120	Suit + sweater
2XL	50-52	60-62	60-62	60-62	58-60	4L-5L	115	185/108A	120-126	Multiple layers
3XL	54-56	64-66	64-66	64-66	62-64	5L-6L	120	190/112A	126-132	Multiple layers
4XL	58-60	68-70	68-70	68-70	66-68	6L-7L	125	195/116A	132-138	Multiple layers

Women's Coats International Size Chart

Women's winter coats and overcoats use letter sizing with additional ease for layering. The chart below provides the complete international conversion.

Coat Size	🇺🇸 US	🇬🇧 UK	🇪🇺 EU	🇫🇷 FR	🇮🇹 IT	🇯🇵 JP	🇰🇷 KR	🇨🇳 CN	Bust (cm)	Worn Over
XS	2-4	6-8	34-36	36-38	40-42	S-M	55	160/84A	80-88	Thin top
S	6-8	10-12	38-40	40-42	44-46	M-L	66	165/88A	88-94	Light sweater
M	10-12	14-16	42-44	44-46	48-50	L-LL	77	170/92A	94-100	Sweater
L	14-16	18-20	46-48	48-50	52-54	3L	88	175/96A	100-106	Thick sweater
XL	18-20	22-24	50-52	52-54	56-58	4L	99	180/100A	106-112	Blazer + sweater
2XL	22-24	26-28	54-56	56-58	60-62	5L	100	185/104A	112-118	Multiple layers
3XL	24-26	28-30	56-58	58-60	62-64	6L	110	190/108A	118-124	Multiple layers

📐

Coat Sizing for Layering: How Much Room Do You Need?

🧣

The key difference between coat sizing and jacket sizing is ease for layering. A coat that fits perfectly over a t-shirt will be unwearable over a suit jacket. Here's how to calculate your ideal coat size based on what you'll wear underneath.

1 Light layering (t-shirt, thin blouse, light sweater): Coat chest should be your body chest + 10-14cm. Buy your standard letter size. This is appropriate for lightweight trench coats, spring coats, and raincoats worn in mild weather.
2 Medium layering (shirt + sweater, blazer): Coat chest should be your body chest + 14-18cm. Buy one size larger than your standard letter size. This is the most common coat sizing for winter coats, wool overcoats, and parkas.
3 Heavy layering (suit jacket + sweater, multiple layers): Coat chest should be your body chest + 18-24cm. Buy 1-2 sizes larger than your standard size. Essential for heavy winter coats, down parkas, and coats worn over tailoring.
4 International note: European coats often have less layering ease than American coats of the same label. An EU L coat may fit like a US M coat. Asian coats have significantly less ease — a Japanese "winter coat" may have the layering room of a Western spring jacket. When buying international coats, always check the garment's chest measurement in cm and add your desired layering ease.

🧠 COAT LAYERING PRO TIP

The "sweater test" is the best way to buy a coat. When trying on or ordering a coat, always think about the thickest thing you'll wear under it. If you'll wear the coat over a suit jacket (adds 4-6cm to your chest measurement), add those centimetres to your body chest when choosing a size. A coat that fits your body perfectly will be too tight the moment you put a blazer on underneath. When shopping internationally, this is doubly important — European and Asian brands build in less layering ease. For a coat that will be worn over tailoring, buy from American or British brands (which traditionally cut coats with generous layering room) or size up by 2 from European/Asian coat sizing.

📏

How to Measure for the Perfect Coat Fit

📐

Coats require the most generous measurements of any garment because they must accommodate everything worn underneath. Measure your chest while wearing your typical winter layers for the most accurate coat sizing.

1 Chest (with layers): Put on the thickest combination you'll wear under the coat (e.g., shirt + sweater, or suit jacket). Measure around the fullest part of your chest over these layers. This is your "layered chest" measurement — use this for coat sizing.
2 Shoulder width: Measure from shoulder seam to shoulder seam across your back. The coat's shoulders should be 1-2cm wider than your body shoulders to accommodate layers without restricting movement.
3 Sleeve length: Measure from shoulder seam to wrist bone. Coat sleeves should end 1-2cm beyond your wrist bone (longer than suit jacket sleeves) to cover gloves and keep warmth in.
4 Coat length: Overcoats: should end at or just above the knee. Trench coats: mid-thigh to knee. Parkas: hip to mid-thigh. Car coats: hip length. The length you choose is a style preference, but longer coats provide more warmth.

❓

FAQ – Coat Size Questions

❓

❓ Should I buy my coat the same size as my suit jacket? +

No — your coat should be one size larger than your suit jacket. Suit jackets are designed to fit over a single dress shirt with 8-12cm of ease. Coats need 14-18cm+ of ease to accommodate a suit jacket or sweater underneath. If you wear a US 42 suit jacket, your ideal coat size is US 44 (or L/XL). If you buy a coat in your suit jacket size, you won't be able to wear it over anything thicker than a t-shirt — which defeats the purpose of a winter coat. The one exception: lightweight trench coats and raincoats designed for spring/fall wear. These can be purchased in your suit jacket size if you'll only wear them over a shirt.

❓ How do I convert my US coat size to European sizes? +

Men's coat conversion: EU coat size ≈ US coat size + 10. US 42 coat = EU 52 coat, US 44 = EU 54, US 46 = EU 56. For French and Italian coats, the sizing is typically the same as standard EU (unlike women's clothing where FR and IT differ). For German coats, DE size = EU size - 2 (EU 52 = DE 50). Women's coat conversion: Letter sizes translate approximately — US S = EU 38-40, US M = EU 42-44, US L = EU 46-48, US XL = EU 50-52. Important: European coats often have less layering ease than American coats. An EU 54 coat may fit more like a US 42 coat (one size smaller) when worn over layers. When buying European coats for winter layering, consider sizing up by one additional size beyond the numeric conversion.

❓ What's the difference between an overcoat, topcoat, and trench coat? +

These are different coat styles with different sizing implications. Overcoat: Heavy, formal winter coat worn over a suit. Long (knee-length or longer). Requires the most layering ease — buy one full size larger than your suit jacket. Topcoat: Lighter than an overcoat, typically mid-thigh to knee length. Can be worn over a suit or sweater. Buy one size larger than your suit jacket. Trench coat: Lightweight, water-resistant coat, typically knee-length with a belt. Often worn over a shirt or light sweater. Can often be purchased in your suit jacket size since less layering room is needed. Car coat: Shorter (hip-length), casual coat. Roomier cut for driving comfort. Buy your standard letter size. Peacoat: Double-breasted, hip-length wool coat. Fitted through the body. Buy one size up for layering. Parka: Casual, often hooded winter coat. Generously cut for layers. Buy your standard letter size — parkas are inherently roomy.

❓ Can I buy coats from Asian brands? +

Yes, but with significant caveats. Asian coats run 2-3 sizes smaller than Western coats and have much less room for layering. A Japanese "winter coat" in size L may have the same chest measurement as a Western spring jacket in size S. For Asian winter coats: size up by 2-3 sizes from your Western coat size. A US M coat wearer needs a JP LL-3L coat. Critical differences: (1) Asian coats have significantly narrower shoulders — even in larger sizes, the shoulder width may be too tight for Western builds. (2) Sleeve length is shorter — Asian coat sleeves are typically 3-5cm shorter than Western equivalents. (3) Body length is shorter — Asian coats often end above the knee where Western coats reach the knee. For the best Asian coat experience, look for "oversized" or "relaxed" fit descriptions, and always check shoulder width and sleeve length in centimetres before ordering.

❓ What are the best international brands for coats? +

For men's overcoats/topcoats: Crombie (UK, heritage overcoats), Burberry (UK, iconic trench coats), Suitsupply (Dutch, modern overcoats with EU sizing), Schott (US, wool peacoats), Gloverall (UK, duffle coats). For men's winter parkas: Canada Goose (Canadian, extreme warmth), The North Face (US, outdoor parkas), Uniqlo (Japanese, affordable — size up 2 for layering). For women's coats: Max Mara (Italian, luxury wool coats), Burberry (UK, trench coats), Mango (Spanish, affordable EU sizing), & Other Stories (Swedish, minimalist), ASOS (UK, extensive plus size range). For plus size/big & tall coats: DXL (US, up to 8XL), Jacamo (UK, up to 5XL), Ulla Popken (German, up to 8XL), Lands' End (US, inclusive sizing with tall options). Browse our brand directory for detailed reviews.

❓ How do I know if my coat is the right size? +

Five signs your coat fits correctly: (1) Shoulder seams sit right at the edge of your shoulder — not drooping down your arm, not pulling tight across your back. (2) You can hug yourself without the back pulling tight or the sleeves riding up. (3) With the coat buttoned over your thickest intended layer, you can fit a flat hand between the coat and your chest — snug but not tight. (4) Sleeves end at the base of your thumb (about 2cm beyond your wrist bone) — longer than a suit jacket to cover gloves. (5) The coat length hits where you want it — for overcoats, at or just above the knee; for car coats, at the hip. Red flags: Can't button over your layers, shoulders pulling tight, sleeves riding up when you reach forward, coat riding up when you sit down. These all mean the coat is too small — size up.

🌟

Master Coat Sizing Worldwide

🧥

A great coat is an investment that should last for years — and getting the size right is essential. Your coat size is typically one size larger than your suit jacket size. A US 44 coat is a UK 44, an EU 54, a JP 3L-4L, a KR 110, and a CN 185/104A. The key to coat sizing is layering ease: 14-18cm beyond your body chest measurement for winter coats worn over sweaters, and 18-24cm for heavy overcoats worn over suit jackets.

Bookmark this coat size calculator. Measure your chest while wearing your typical winter layers — this is your true coat measurement. For European coats, consider sizing up for layering room. For Asian coats, size up by 2-3 sizes and check shoulder width carefully. And remember: a coat that fits over a t-shirt but not a sweater is not a winter coat — it's a jacket. Size up. For more size guides, explore our complete collection of size guides, brand reviews, and international shopping tips.

About the PlusSizePlus Editorial Team

This article was researched, written, and reviewed by the PlusSizePlus Editorial Team. Our team creates comprehensive educational resources covering fashion for all sizes, international size conversion, shopping guides, brand comparisons, and practical style advice. We review our articles and tools periodically.

Learn more about our Editorial Team →

Disclaimer: This coat size calculator provides size estimates based on standard international sizing conventions. Sizing varies between brands, specific garments, and fabric types. Always consult the specific retailer's size chart. For important limitations, read our full Disclaimer.

PlusSize+

Search This Blog