I bought these in Bali for my son, despite them supposed to be an 11 they were too tight for him. So I'd say they would be more like a 10.
Very disappointing for me
2 x size 10 beach shoes
1 x size 11 high top shoes
1 x size 12 runners
1 x size 12 leather school shoes (sold)
1 x size 13 runners(sold)
1 x size 13 leather school shoes
