I tried the Hy Mesh Half Mask in a cob size. My pony, Utah, is 13.3hh but has quite a chunky head. I tested all the fly masks in cob or medium sizes and found this one ran the smallest.

Find out how Georgi and Jamie Broom of Lakeside Equestrian Centre rated the Shires ARMA Travel ... Woof Wear UV Fly Mask With Ears *H&H Approved* Hy Equestrian Mesh Half Mask With Ears And Fringe ...