Velcro, not a buckle
"These are super cute, but will sadly go back bc of terrible fit. Hate the Velcro instead of a real buckle. I need to tighten the strap to keep it on my feet. To make the Velcro fit, it barely overlaps. On one hand, cudos for making the shoe look exactly like a buckle, but I functionally need the buckle. Also, there is a much bigger gap between my foot and the top of the toe box than on other similarly styled shoes."