I am a size 7.5, but Amazon did not offer half sizes for these Sorel boots, (maybe Sorel doesn't make half sizes), so I purchased a 7.  They fit and are not too tight, but I would have liked that half size bigger.  The boots do have a big bulky feel so an 8 would have been too big.  They are a little tough to get on with the liner, but once on they are comfortable.  My feet stayed dry and warm while playing out in the snow.