I bought the horse size for my 16.1 hand running quarter horse. I gave it 3 stars because I like the look and quality feel of this mask, the mesh is soft and the fleece is thick. However, my horse gets it off every single day. This may be because of the elastic insert at the closure, it feels like good quality, but it's just too stretchy. If I pull the velcro closure tight so he can't get it off during a single roll, it pulls the mesh down where it rubs his eyes. And he'll still have it off in half a day. I haven't had this issue with this horse with other brands of fly masks, so I would not recommend this mask. The materials seems to be great quality, but the design needs improvement.