Our favorite minimal barefoot sandals for summer. These sandals are secure, but easy enough for most kids to get on and off by themselves. All children's sandals come in standard (EU) sizes and are a stack height of ~8mm. We have built in a very slight upward pull at the toes on smaller sizes to help prevent tripping. The upward pull is flattened out by slight weight but lifts with the toes as the child walks. Check out unshoes website for sizing help. These are EU 25, or 8.5/9 US.