These often feel tight initially but will "pack out" and stretch as the fibers compress with wear.

There should be approximately 1/4 inch of space at the front so your toes can wiggle freely.

If you frequently wear thermal or fuzzy socks, experts at Aerothotic suggest ordering a size larger than your usual footwear to prevent your toes from feeling cramped. Material Behavior:

The slippers should stay secure on your feet when walking quickly; if they slide off easily, they are likely too large. Alpha Size Conversion

Once your slippers arrive, perform these quick checks suggested by Shepherd of Sweden and Impakto :

Your heel should rest fully on the sole and not hang over the edge.