These slippers are great. I chose Acorn because I had another pair over 5 yrs old and wore them into the ground. They are cozy and keep my feet toasty warm. Initially they seemed a bit tight but stretch out over a couple of weeks to fit perfectly. I wear a 7.5 or 8 depending on the shoe. I ordered the 6.5 - 7.5 because I didn't want a sloppy fit.
I highly recommend these slippers