These are very comfortable slippers. Soft and comfortable to walk on. But even if you know your shoe size, it is necessary to carry out the calculation of the size chart on the page just above the size you want. I take size 11 and was going to order 11 but I looked at the size chart and based on my data it recommended buying 10.5 not 11. Surprisingly 10.5 fits perfectly even though I take 11 inches everything else. Very happy with these slip ons!