We purchased size 8US.
This pair of Pumas fit my 2.5 year old son's feet perfectly ! This was his first pair of good sneakers a little over a year ago! We started at size 6 and he's now on his 3rd pair! The first 2 pairs we bought were hand me downs! So you know they are good quality and they "wear" VERY well. Ideally these sneakers should be worn with thinner socks. We will certainly be investing in the next size(s) up!! Helpful hint: If you have scuffing or dirt on the toe box area, they are super easy to clean with a magic eraser. The pic attached is of all  3 pairs clockwise in photo size 8,6,7