Shoe Sizes, Clothing Sizes & Ring Sizes

Men's shoes — US to EU:

US	EU	UK	CM (foot length)
7	40	6	25 cm
8	41	7	26 cm
9	42	8	27 cm
10	43	9	28 cm
11	44	10	29 cm
12	46	11	30 cm

Women's shoes — US to EU:

US	EU	UK	CM (foot length)
6	36–37	4	23 cm
7	37–38	5	23.5 cm
8	38–39	6	24.5 cm
9	39–40	7	25.5 cm
10	40–41	8	26.5 cm

These are approximations. Sizing varies by brand — when in doubt, measure your foot length in cm and compare to the brand's specific chart.

Japanese shoe sizes are measured in centimeters (foot length). They're the most intuitive system — measure your foot and that's your size.

US Men's → Japan: Multiply US size by 0.918 + 13.96 (approx), or use the chart:
US 8 ≈ JP 26 cm · US 9 ≈ JP 27 cm · US 10 ≈ JP 28 cm · US 11 ≈ JP 29 cm

US Women's → Japan:
US 6 ≈ JP 23 cm · US 7 ≈ JP 23.5 cm · US 8 ≈ JP 24.5 cm · US 9 ≈ JP 25.5 cm

For Korean (KR) sizes, the system is identical to Japanese — both use foot length in mm (so JP 27 = KR 270).

Best method:
1. Stand on a piece of paper with your heel against a wall
2. Mark the tip of your longest toe
3. Measure from the wall to the mark in centimeters
4. Measure both feet — use the larger measurement

Tips:
• Measure in the afternoon — feet swell slightly during the day
• Wear the type of socks you'll wear with the shoes
• Different brands and styles can run differently — always check that brand's size chart when buying online

String/paper method:
1. Wrap a thin strip of paper or string around the base of your finger
2. Mark where it overlaps
3. Lay it flat and measure the length in millimeters — this is your circumference
4. Divide by π (3.14159) to get your diameter in mm

Common US ring size reference:

US Size	Circumference (mm)	Diameter (mm)
5	49.3	15.7
6	51.9	16.5
7	54.4	17.3
8	57.0	18.1
9	59.5	18.9
10	62.1	19.8

Tips: Measure when your hands are warm (cold fingers shrink). If between sizes, go up. For wide bands, size up half a size.

US	UK	EU	Label
0	4	32	XXS
2	6	34	XS
4	8	36	S
6	10	38	S/M
8	12	40	M
10	14	42	M/L
12	16	44	L
14	18	46	XL
16	20	48	XXL

These are approximate conversions. Brands vary significantly — always check the specific brand's size chart and, when possible, measure your bust, waist, and hips and compare to their measurement guide.

Men's clothing sizing is generally more consistent internationally than women's, because it's often based on actual measurements (chest, waist, inseam) rather than arbitrary numbers.

Tops/Shirts (chest measurement basis):

US/UK Label	EU Size	Chest (in)
S	46–48	35–37"
M	48–50	38–40"
L	52–54	41–43"
XL	56–58	44–46"
XXL	60–62	47–49"

For trousers, US and EU systems differ — EU uses waist circumference in cm. US 32" waist ≈ EU 81 cm.