“I am 5.5 and size 12 and went for medium, they were initially very big and very long but despite washing as per instructions (and in one of their laundry bags) they shrank significantly, they have actually shrunk to the perfect size so I can’t complain but I was quite surprised - they were initially too long and dragged on the floor and now they just touch the floor, I would say they’ve shrink by a whole dress size too. Despite this they are lovely soft and so comfortable, thinner than I had expected but very cozy”