Nabbed myself the 2XS when it came back in stock. As a small man ("Get me a small man's wetsuit please", Hurt Feelings by Flight of the Conchords, 2009 😂), this fitted perfectly. Also bought some 28 inch waist jeans and then were perfectly snug (for size reference). As someone who used to have a massive a**e which has since disappeared to nothing, there wouldn't be enough room for half the a**e I used to have, so maybe a size up if your cheeks are plump. Absolutely cannot fault anything about these dungarees. They look great (plenty of compliments) and they feel like such quality. I am so glad I took the punt as I've wanted some loud dungarees for a while. A*****