How can I convert my pants size between American and European systems?

Measure your waist in inches to get your US pants size, then look it up in the pants table above. A US 32, for instance, corresponds to a European 48. European sizing covers many countries and can vary slightly between them, so treat these numbers as a starting point and check the specific brand's chart for the best fit.

What should I know about converting dress shirt sizes between American, English, and European systems?

American shirt sizes use two numbers: neck size and sleeve length, both in inches. European sizes typically use a single number for neck size and assume a standard sleeve length. To convert, match your American neck size to the closest European one. A 15.5-inch neck in the US is roughly a 39 in Europe. If sleeve length matters to you, check whether the brand offers different lengths separately.

Are there differences in sizing for trousers and dress shirts within the European system?

Yes. European trousers are sized by waist measurement in centimeters, while dress shirts are sized by neck circumference. Because they measure different parts of the body, you'll likely have a different number for each. Convert and compare them separately when shopping across European brands.

How do I get the best fit when sizes vary between brands?

Take your own measurements (chest, waist, and hips for jackets and trousers; neck and sleeve for shirts) and compare them directly to the brand's size chart. Many brands also list the model's measurements on product pages, which helps. When possible, try things on before buying, especially with international brands. Customer reviews often mention whether items run large or small.

Can I use this conversion chart for accessories like belts or shoes?

This chart covers clothing only: jackets, trousers, and dress shirts. Belts often follow waist sizing but vary by brand, and shoes have their own entirely separate conversion system. You'll need a dedicated chart for those items.

What is size 42 in US men's clothing?

A US 42 typically refers to jackets, blazers, or coats. In the chart, it corresponds to UK 42, European 52, Russian 52, Japanese 44, Korean 110, and L in S-M-L sizing. For suits, a 42 Regular means the jacket has a 42-inch chest measurement and a standard length for average height. The matching trousers are usually about 6 inches smaller at the waist, so roughly a 36.

What is size 30 jeans in US men's clothing?

A US size 30 means a 30-inch waist. In the pants table, that converts to a European 46. Jeans sizing can be inconsistent between brands though, so measure your actual waist and compare it to the brand's specific measurements rather than relying on the label number alone.

What advice do you have for shopping internationally online?

Start with your actual body measurements rather than your usual size label. Look for size charts or conversion tools on the retailer's website. Read product descriptions for fit notes like "slim fit" or "runs large." Check the return policy before ordering, since international returns can be slower and more expensive. If you're unsure, reach out to customer service and ask for the garment's specific measurements.

Men's International Size Conversion Chart

Convert men's clothing sizes between US, UK, European, Russian, Japanese, and Korean sizing systems. Covers jackets, blazers, coats, pants, and dress shirts.

Last updated: February 23, 2026

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International Conversion Chart for Mens Suit Jackets, Blazers & Coats

Convert jacket, blazer, and coat sizes between international sizing systems. Click any row to highlight equivalent sizes across all tables.

US	UK	Europe	Russia	Japan	Korea	S-M-L
30	30	40	40	32	80	XXS
32	32	42	42	34	85	XS
34	34	44	44	36	90	S
36	36	46	46	38	95	S
38	38	48	48	40	100	M
40	40	50	50	42	105	M
42	42	52	52	44	110	L
44	44	54	54	46	115	L
46	46	56	56	48	120	XL
48	48	58	58	50	125	XXL
50	50	60	60	52	130	XXXL

Pants & Trousers

Convert pants and trousers sizes between US and European sizing systems. Click any row to highlight the corresponding size.

US	European
30	46
32	48
34	50
36	52
38	54
40	56
42	58

Dress Shirts

Convert dress shirt sizes between US, England, European, and Japanese sizing systems. US and England sizes are based on neck circumference in inches.

US (Neck)	England	Europe	Japan	S-XL
14	14	36	87	S
14.5	14.5	37	91	S
15	15	38	97	M
15.5	15.5	39	102	M
16	16	41	112	L
16.5	16.5	42	117	L
17	17	43	122	XL
17.5	17.5	44	127	XL
18	18	45	132	XXL

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How to Measure Yourself

Chest

1.Stand straight with your arms relaxed at your sides.
2.Wrap the measuring tape around the fullest part of your chest, just under your armpits.
3.Keep the tape level and snug but not tight.
4.Read the measurement in inches or centimeters.

Waist

1.Stand naturally and locate your natural waistline, above your hip bones.
2.Wrap the tape around your waist, keeping it level all the way around.
3.Don't pull the tape too tight — you should be able to fit a finger between the tape and your body.
4.Read the measurement while breathing normally.

Neck

1.Stand up straight and look forward.
2.Wrap the measuring tape around the base of your neck where a shirt collar sits.
3.Place one finger between the tape and your neck for a comfortable fit.
4.Round up to the nearest half inch for your dress shirt size.

Tips for International Size Shopping

Brands vary in sizing

Even within the same country, different brands can have slightly different measurements for the same labeled size. Always check the brand's specific size chart when available.

Try before you buy when possible

If shopping in-store, always try on garments. Sizing charts are a guide, but the actual fit depends on the cut, fabric, and your body shape.

Check brand-specific size charts

Many retailers provide their own detailed size guides with body measurements. These are more accurate than generic conversion charts.

Consider fabric stretch

Garments with elastane or spandex will have more give. If a piece has stretch, you may be able to go with a smaller size for a more fitted look.

Size up when in doubt

If you're between sizes, it's generally better to go with the larger size, especially for outerwear and formal pieces. A tailor can always take things in.

Keep receipts for returns

When ordering international sizes online, make sure the retailer has a good return policy. Keep all tags attached until you're sure about the fit.

FAQ on Men's International Size Conversion Chart

Start by measuring your chest width, shoulder width, and sleeve length to determine your US jacket size. Then look up the corresponding row in the chart. If your US size is 38, for example, you'd find UK 38, Europe 48, Russia 48, Japan 40, Korea 100, and M in the S-M-L column. Keep in mind that fit varies by brand, so check the brand's own size chart when you can.

Related Conversion Charts

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Women’s Clothing Size Chart

Convert women’s clothing sizes between US, UK/AU, Italian, French, German, Japanese, and Russian sizing systems.

International Dress Size Chart

Convert dress sizes between US, UK, and EU systems with bust, waist, and hip measurements in cm and inches.

Men’s & Women’s Shoe Size Chart

Convert adult shoe sizes between US, UK, EU, AU, China, and Japan sizing systems for women and men.

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