Size	Imperial (Crocs)	Metric (cm) (Geox)	Approximate Age
20	4	Infant (0 – 12 months)
21	5	12.1-12.7
22	5 1/2	13-13.3	Children (1 – 5 years) 18 months
23	6	14
24	7	14.3-14.6
25	7 1/2	15.2	24 months
26	8	15.6
27	9	15.9-16.5	3 years
28	10	16.8
29	11	17.1	4 years
30	12	17.8-18.1	5 years
31	13	18.4-19.1	Youth (6 – 10 years)
32	13 1/2	19.4-19.7
33	1	20.3-20.6	6 years
34	2	21-21.6
35	2 1/2	21.9	7 years
36	3	22.2
37	4	22.9-23.2	8 years
38	5	23.5
39	6	24.1	9 years