Crocs Size	UK Size	EU Sizes	JP Size	Korea Size	Inches	Foot length (mm)
C2	N/A	N/A	N/A	N/A	3 7/8	98
C3	N/A	N/A	N/A	N/A	4 1/8	107
C4	4	19-20	12	140	4 1/2	115
C5	5	20-21	13	150	4 7/8	123
C6	6	22-23	14	155	5 1/8	132
C7	7	23-24	15	160	5 1/2	140
C8	8	24-25	15.5	165	5 7/8	149
C9	9	25-26	16.5	170	6 1/8	157
C10	10	27-28	17.5	180	6 1/2	166
C11	11	28-29	18	185	6 7/8	174
C12	12	29-30	18.5	190	7 1/8	183
C13	13	30-31	19	195	7 1/2	191
J1	1	32-33	19.5	200	7 7/8	200
J2	2	33-34	20	210	8 1/8	208
J3	3	34-35	21	220	8 1/2	217
J4	4	36-37	22	230	8 7/8	225
J5	5	37-38	23	240	9 1/8	233
J6	6	38-39	24	250	9 1/2	242