Let me first say that we bought this shoe for our 2-year-old girl to wear in California's fall/winter with wool socks. They're not super thick but they are thicker socks than usual. She loved the look of the shoes out of the box. But the minute we got her into the shoes, she took them off, complaining that they were too tight across the top, where her toes meet her foot. Even with loosened laces, the shoe doesn't have enough give at that spot to make them fit with her wool socks on. I came back to the shoe page to try to get a larger size but, alas, she already tried the largest size, 9, and there's only M width available.