Adults 

US M's	US W's	UK	EU		US M's	US W's	UK	EU
4	5	3.5	36		9.5	10.5	9	43
4.5	5.5	4	37		10	11	9.5	44
5	6	4.5	37.5		10.5	11.5	10	44.5
5.5	6.5	5	38.5		11	12	10.5	45
6	7	5.5	39		11.5	12.5	11	45.5
6.5	7.5	6	39.5		12	13	11.5	46
7	8	6.5	40.5		12.5	13.5	12	47
7.5	8.5	7	40.5		13		12.5	47.5
8	9	7.5	41		13.5		13	48
8.5	9.5	8	42		14		13.5	48.5
8	10	8.5	42.5		14.5		14	49.5

 

Kids

US	UK	EU		US	UK	EU
9K	8.5	36		2	1	33
9.5K	9	27		3	2	34
10K	10	28		3.5	2.5	35
11K	11	29		4.5	3.5	36
12K	11.5	30		5	4	37
13K	12.5	31		6	5	38
1	13	32		6.5	6	39