Donkey vs Mule: 5 Key Differences Explained A Z Animals Why Can't Mules Reproduce? Delving into the Genetics of Sterility 23 Hybrid Animals That Will Surprise You Richmond Mom Atoshopce Mules for Women Round Toe Slip On Flat Mules Summer Shoes for Mule Facts Mule, Donkey & Horse Training with Meredith Hodges Mule A Z Animals. Buckled Houndstooth Mules Size 34 35 36 37 38 39 40 Heel Height 2 2 2 2 2 2 2 measurement is cm. Product Information Material: Upper: MicrofiberOutsole: TPR Color: Off White