I ordered a bit big as recommended. I normally get 45s, so I ordered a 46 for the insulated ones. I am able to wear socks with them, even my nuwool ones. They are surprisingly warm, and could be the most comfortable 5 fingers I've owned to date. That's not to say my others are uncomfortable, they are all great. I've even worn these at tradeshows, standing all day on a hard surface, and been comfortable. Another great product, even if the sizing is a bit weird.