Excellent fitting long underwear. They are literally underwear that is long. Simple as that. Because of the size confusion I bought a few in Medium and a few in Large. I typically wear a size Small in US sizes for underwear as I have a 30 inch waist. The Medium was perfect..... a tiny bit snug but I like that. The Large fit good but it was just a little too loose for me. They are great for lounging around the house!