These slipper socks appear to be very high quality, very comfortable, and the stated size range appears to be accurate: the fit was fine for me, a US size 8 1/2 Medium width. The product is quite inexpensive despite the added cost of shipment; buying two of them reduced the extra cost per pair. Moreover, the shipment was received surprisingly quickly, considering it had to cross the Atlantic from England to the US. I give both the product and the seller five stars.