iPlay Boys' Tropical Flap Sun Hat (0mos-4T)

I purchased size 2t-4t for my son hes 15months old. I was concerned it wouldnt fit. Hes wearing 18-24 months rite now. It's a great fit a lil big but nothing that obstructs his vision to walk and see where hes going. The ties help with him keeping the hat on his head. He doesnt know how to untie it yet. So he kept it on the whole few hrs we were out in the sun. It's the perfect length and it actually helps keeping the sun out of his face, & neck from any sun burn. It meets my expectations. Good quality fabric and has lining not heavy lining.