Not true to size. My Dad wears a 10.5 and this slippers arei huge. Sent them back. Ordered the medium ones and they're way too small.  My Dad has a pair of Acorn slippers which he's had for many years and loves. Those were made in the USA and were a much better quality and the size was just a 10.5 not a huge range of sizes in one pair. Do not bother with these. You will be very disappointed.