Clothing size reference

A quick shopping reference for men's sizes. These are typical body-measurement guides, not promises that every brand will fit the same way.

Important: sizing is not globally standardised. Use these tables to narrow down a size, then check the specific brand's chart. The same body can fit different labelled sizes because cut, fabric, ease, and brand blocks differ.

What to measure first

Chest

Around the fullest part of the chest, with the tape flat under the arms.

Natural waist

Around the waist where the body naturally bends. For trousers, also measure where the waistband actually sits.

Collar

Around the base of the neck where a shirt collar sits. Shirt labels often show centimetres or inches.

Seat / hips

Around the fullest part of the seat. More important for fitted trousers and underwear.

Inside leg

From the crotch to the ankle or floor. Jeans often show waist/inside-leg, such as W36/L40.

Foot length

Measure both feet standing, then use the longer foot. Measure at the end of the day and size up when between sizes.

T-shirts, knitwear, casual jackets

Typical chest fit. The EU jacket number is a useful tailoring reference, not a universal T-shirt label.

International	Chest cm	Chest inches	EU jacket
XXS	81–86	32–34	44
XS	86–91	34–36	46
S	91–96	36–38	48
M	96–101	38–40	50
L	101–106	40–42	52
XL	106–111	42–44	54
XXL	111–116	44–46	56

Smart shirts

The collar is the key number. A label such as 37/38 means a collar range in centimetres; US/UK labels commonly show inches.

International	EU collar cm	US/UK collar in	Chest cm
XS	35/36	13½/14	80–84
S	37/38	14½/15	88–92
M	39/40	15¼/15¾	96–100
L	41/42	16/16½	104–108
XL	43/44	17/17¼	112–116
XXL	45/46	17¾/18	120–124

Trousers, jeans and shorts

Jeans usually use inches: the first number is waist and the second is inside leg. EU equivalents are approximate.

Waist in	Waist cm	Typical EU	International
28	71	42	XS
30	76	44–46	S
32	81	46–48	S–M
34	86	48–50	M
36	91	52–54	L
38	96	54–56	L–XL
40	102	56–58	XL
42	107	58–60	XXL

Your 100 cm inseam is about 39.4 inches. In a shop, look for L40, 40L, extra-long, or a long/tall option. Standard regular lengths are commonly L30, L32, or L34, so alterations may be needed.

Underwear and swimwear

Waist measurement is usually more reliable than the letter size.

International	Waist cm	Waist inches
XXS	66–71	26–28
XS	71–76	28–30
S	76–81	30–32
M	81–86	32–34
L	86–91	34–36
XL	91–96	36–38
XXL	96–101	38–40

Footwear

This is a common retailer-style reference, not a universal conversion.

EU	UK	US men
40	6	7
41	7	8
42	8	9
43	9	10
44	10	11
45	11	12
46	12	13

Brand charts can differ materially. For example, Nike lists EU 44 as UK 9 / US men 10, while adidas lists EU 44 as UK 9.5 / US men 10. Check the shoe brand rather than converting once and assuming it applies everywhere.

Nike example

EU	UK	US men	Foot cm
44	9	10	28.0
45	10.5	11	28.4

adidas example

EU	UK	US men	Heel-to-toe cm
44	9.5	10	27.1
45⅓	10.5	11	28.0

What you already have on the site

Monthly body measurements: waist, stomach, hip, chest, neck, thigh and biceps.
Personal clothing profile: height, inseam, inside arm, shoe sizes and the formats you enter from brands.

For the standards behind body-based clothing sizing, see ISO 8559-2:2025. It defines the dimensions used for size designation; it does not make every brand use identical garment dimensions.

Source charts

ASOS men's size guide for the practical chest, waist, inside-leg, underwear and common footwear tables.
H&M men's size guide for collar, EU tailoring, trouser and long-measurement examples.
Nike men's footwear chart and adidas men's footwear chart for brand-specific shoe conversions and foot measurement.