Sizing for this product is not included in the description on Amazon.  However it does come with the socks, which made it clear I ordered the wrong size - I wear an  8 1/2 size shoe and ordered the large size, but I should have ordered medium.  So the socks were too big.  In addition they were not sticky enough on the bottom, I used them in pilates and I was better off with bare feet.  I returned them and bought a pair locally from a different vendor and the difference was remarkable.  I would not recommend these.