My husband and I each have a pair that were gifts and think these are better than Yaktrax.  During really cold spells, my husband wears his big old Ugg shoes and the Extra Large size we just ordered fit size 11 Uggs perfectly. He wears a 10-101/2  shoes/athletic shoes and the Large goes on easily. I wear an 8 and the Mediums are perfect.  While the Stabilicers grip the ice well,  walking over our entry tiles coming or going out is slippery ... take care.