The boots do not run a size big like some of the posts say... they were too small, and stiff, narrow and tight around the ankle, I think to keep your foot from slipping out. Thin insulation and not enough room to add a couple pairs of winter thermal socks. I sent them back for a refund. They might work okay for someone else but not for what I need them for. I wear a 14 medium and my toe touched the end.