Adorable sneakers. Please check converse size chart on Google. They run half size too big. The 4 is 11.5 cm and the 5 is 12.5 and the 6 13 cm.  My daughters feet have grown now to 12.5 cm but when i tried on the 5, it was too big. When i purchased this i got the 4 and she really enjoyed it. Its comfortable and supportive enough for those little new walking toddlers