US Size	EU Size	Approx. Age	Inches	CM
0- Crib Shoe	15	Birth up to 6 wks	3.87	9.8
1- Crib Shoe	16	6 wks- 3 mo	4.25	10.8
2-Crib Shoe	17	3-6 mo	4.5	11.4
3-Crib Shoe	18	6-9 mo	4.87	12.4
4-Crib Shoe	19	9-12 mo	5.25	13.3
5-Crib Shoe	20	12-18 mo	5.5	14
2-Every Step	18.5	6 to 9 mo	4.13	10.5
2.5- Every Step	19	6 to 9 mo	4.31	10.95
3-Every Step	19.5	6 to 9 mo	4.48	11.4
3.5- Every Step	20	9 to 12 mo	4.68	11.9
4-Every Step	21	9 to 12 mo	4.84	12.3
4.5- Every Step	21.5	9 to 12 mo	5	12.7
5-Every Step	22	12 to 18 mo	5.15	13.1
5.5- Every Step	22.5	12 to 18 mo	5.31	13.5
6-Every Step	6	12 to 18 mo	5.42	13.9
S- Baby Slipper	16	0-6 mo	4.25	10.8
M- Baby Slipper	17	6-12 mo	4.5	11.4
L- Baby Slipper	18	12-18 mo	4.87	12.4
XL- Baby Slipper	19	18-24 mo	5.25	13.3
1 (XXS)	16	0 to 12 mo	3.5	8.9
2 (XXS)	17	0 to 12 mo	3.74	9.5
3 (XS)	18	12 to 24 mo	4.13	10.5
4 (XS)	19	12 to 24 mo	4.48	11.4
5 (S)	20	12 to 24 mo	4.72	12
6 (S)	22	12 to 24 mo	5.11	13
7 (M)	23	toddler 2 to 4 yr	5.51	14
8 (M)	24	toddler 2 to 4 yr	5.74	14.6
9 (L)	25	toddler 2 to 4 yr	6.1	15.5
10 (L)	27	toddler 2 to 4 yr	6.49	16.5
11 (XL)	28	little kid 4 to 6 yr	6.81	17.3
12 (XL)	30	little kid 4 to 6 yr	7.08	18
13 (XXL)	31	little kid 4 to 6 yr	7.48	19
1Y (XXL)	32	big kid 6 to 9	7.71	19.6
2Y (XXXL)	33	big kid 6 to 9	8.11	20.6
3Y (XXXXL)	34	big kid 6 to 9	8.5	21.6