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Foot Length (mm)	US (Men)	US (Women)	UK	EU	Japan (JP)	China (CN)	Korea (mm)
150	-	-	8K	25	15	25	150
155	-	-	8.5K	25.5	15.5	25.5	155
160	-	-	9K	26	16	26	160
165	-	-	9.5K	27	16.5	27	165
170	-	-	10K	28	17	28	170
175	-	-	10.5K	28.5	17.5	28.5	175
180	-	-	11K	29	18	29	180
185	-	-	11.5K	30	18.5	30	185
190	-	-	12K	31	19	31	190
195	-	-	12.5K	31.5	19.5	31.5	195
200	1 (Kids)	-	13.5K	32	20	32	200
205	1.5	-	1	33	20.5	33	205
210	2.5	4	2	34	21	34	210
215	3	4.5	2.5	35	21.5	35	215
220	4	5.5	3.5	36	22	36	220
225	4.5	6	4	36.5	22.5	37	225
230	5	6.5	4.5	37	23	37.5	230
235	5.5	7	5	37.5	23.5	38	235
240	6	7.5	5.5	38	24	39	240
245	6.5	8	6	38.5	24.5	39.5	245
250	7	8.5	6.5	39	25	40	250
255	7.5	9	7	40	25.5	41	255
260	8	9.5	7.5	41	26	42	260
265	8.5	10	8	41.5	26.5	43	265
270	9	10.5	8.5	42	27	44	270
275	9.5	11	9	43	27.5	44.5	275
280	10	11.5	9.5	44	28	45	280
285	10.5	12	10	44.5	28.5	46	285
290	11	12.5	10.5	45	29	47	290
295	11.5	13	11	45.5	29.5	48	295
300	12	13.5	11.5	46	30	48.5	300
305	12.5	14	12	47	30.5	49	305

Quick Fit Guide

The most accurate method: Place foot on paper, trace the outline, and measure the length from heel to longest toe in millimeters (Mondopoint).
Don't forget width! If you have wide feet, consider sizing up by half a size or looking for 'Wide' (E/EE) variations.
Brand sizing varies significantly (e.g., Nike often runs smaller than Adidas). Always check the specific brand's size chart if available.
For kids, feet grow fast! It's usually safer to size up slightly to allow room for growth (about 10-15mm extra space).