Jacket Size Calculator
Enter your body measurements to find your jacket size in both US alpha sizing (XS, S, M, L, XL...) and European numeric sizing. Supports men, women, and kids, with metric and imperial unit options. Results include your size, EU equivalent, and for men, the recommended jacket length fit (Short, Regular, Long).
How to take your measurements
Accurate measurements are the key to a well-fitting jacket. For the chest, wrap a flexible tape measure around the fullest part of your chest just under the armpits, keeping the tape horizontal and parallel to the floor. Leave roughly 1-2 cm of ease; the tape should feel snug but not tight. For women, measure the bust at its fullest point. For hips (women), wrap the tape around the widest part of the buttocks. For height, stand without shoes and measure from the floor to the top of your head. For children, measure height and weight as they are the two most reliable indicators for outerwear sizing. If possible, have a second person help; it is difficult to hold the tape correctly on your own.
US vs EU jacket sizing explained
US men's jackets use alpha sizes (XS through 6XL) paired with a length code: Short (S), Regular (R), or Long (L). European sizes use a numeric scale running from about 40 to 72 for men and 32 to 62 for women, roughly matching the chest circumference in centimetres minus a constant. So an EU 50 men's jacket typically fits a chest of around 99-103 cm. Women's EU sizes follow a similar logic based on the bust measurement. Because the EU scale is more granular, the same alpha size (for example L) can map to EU 50 or 52 depending on height, which is why this calculator returns both. When converting between the two systems, always verify against the specific brand's chart, because some European manufacturers add 4-6 cm of ease into their cut while others size more closely.
Men's jacket length: Short, Regular, Long and Extra Long
Alpha chest size tells you how wide the jacket is; the length code tells you how long the body and sleeves are. Short (S) jackets suit men under about 168 cm (5'6"). Regular (R) fits most men between 168-182 cm (5'6"-6'0"). Long (L) is designed for men 182-190 cm (6'0"-6'3"), and Extra Long (XL) for those above 190 cm. Getting the length right is as important as getting the chest right: a jacket that is too short will pull at the shoulders and show too much shirt cuff, while one that is too long will look oversized. If you fall between lengths, tailors typically recommend the longer option and have the sleeves shortened.
Kids' jacket sizing and fit tips
Children's outerwear is sized mainly by height, with weight as a secondary factor. Toddler sizes (2T-5) are sized by age and height, while school sizes (6-14) follow height more closely. Because children grow quickly and outerwear is worn for at least a season or two, many parents size up by one for jackets. Check that the shoulders lie flat without drooping and that the child can raise their arms comfortably; a jacket that is too tight across the back will restrict movement even if the length looks correct. Adjustable cuffs and expandable hems make kids' jackets more forgiving of growth spurts.
Men's jacket size chart (US and EU)
| US Size | EU Size | Chest (cm) | Chest (in) | Typical height (cm) |
|---|---|---|---|---|
| XXXS | 40 | 76-83 | 30-32 | 160-166 |
| XXS | 42 | 83-87 | 32-34 | 163-168 |
| XS | 44 | 87-91 | 34-36 | 167-172 |
| S | 46 | 91-95 | 36-38 | 170-175 |
| M | 48 | 95-99 | 38-40 | 173-178 |
| L | 50 | 99-103 | 39-41 | 176-181 |
| L | 52 | 103-107 | 41-42 | 179-184 |
| XL | 54 | 107-111 | 42-44 | 182-186 |
| XL | 56 | 111-115 | 44-45 | 184-188 |
| XXL | 58 | 115-119 | 45-47 | 187-191 |
| XXL | 60 | 119-123 | 47-48 | 188-192 |
| 3XL | 62 | 123-127 | 48-50 | 190-195 |
| 3XL | 64 | 127-131 | 50-52 | 192-197 |
| 4XL | 66 | 131-135 | 52-53 | 193-197 |
| 5XL | 68 | 135-139 | 53-55 | 195-199 |
| 6XL | 72 | 143-147 | 56-58 | 198-204 |
Chest-first sizing. EU size may shift by 2 if height is significantly above or below the typical range for that chest size.
Frequently asked questions
How do I measure my chest for a jacket?
Wrap a flexible measuring tape around the fullest part of your chest, just under your armpits, keeping the tape horizontal. For men this is across the pectoral muscles; for women it is across the fullest part of the bust. Keep about 1-2 cm of ease - snug but not compressing. Have a friend help if possible, as pulling the tape at an angle gives an inaccurate reading.
What is the difference between EU 50 and EU 52 in men's jackets?
EU 50 and 52 are both often labelled 'L' in US alpha sizing but represent different chest-to-height proportions. EU 50 typically fits a chest of 99-103 cm with a height around 176-181 cm, while EU 52 fits 103-107 cm at 179-184 cm. If you are on the border, your height helps determine which EU size gives the better sleeve and body length.
My bust and hips fall in different size zones - which do I choose?
Size up to the larger measurement and have the smaller dimension taken in by a tailor. For jackets and blazers, fit across the shoulders and chest is the hardest to alter; waist seams and hip panels are much easier to adjust. Choosing the smaller size to fit your bust will likely mean the hips won't button, which is harder to fix.
What jacket length should I choose?
For men's jackets, Short (S) suits heights under about 168 cm (5'6"), Regular (R) fits 168-182 cm (5'6"-6'0"), Long (L) is for 182-190 cm, and Extra Long (XL) for heights above 190 cm. If you fall between two lengths, choose the longer and have the sleeves shortened; it is much easier to take sleeves up than to add length. Women's jackets do not commonly use these codes, but hip-length versus thigh-length coats follow similar logic.
Why does my jacket size vary between brands?
Garment sizing is not standardized internationally, and brands differ in how much ease they build into each size. A European brand may cut their L more closely than an American one, and Asian sizing often runs one to two sizes smaller than US sizing for the same chest measurement. Always check the brand-specific measurement chart and compare it to your actual body measurements rather than relying on the size label alone.
How much bigger should I size for a coat versus a blazer?
A coat worn over a suit jacket typically needs 4-8 cm extra in the chest compared to your fitted jacket size. If you wear a size M blazer (chest 95-99 cm), look for an overcoat with a chest measurement of 103-107 cm (L) so it sits comfortably over the jacket without pulling. For a coat worn over just a shirt or sweater, your regular size usually works fine.