This is easily one of the brest styles of Crocs, period. The fit is spot-on, and true to size. I am a US Men's 12.5 for my true size, and I tend to wear running shoes in 13 and casual shoes in 12.5. I like my Crocs to fit with just enough room for thick socks for a form fitting yet comfortable size.... I wear 12 in Classic clogs, 12 in the Mellow line, 11 in Echo, and 11 in the Off-Grid. For these, a 12 is perfect and fits exactly like the Classic Clogs. I purchased these for an upcoming cruise to wear around the pool, around the ship, and for casual wear. The outer sole has good tread and is firmer, while the lite ride in the insole provides good cushion and support. The strap locks in the heel a bit more than traditional crocs, but I seldom need to use it as the clog fits very well as-is. Ventilation is excellent with plenty of holes, and I didn't have any problem wearing them with or without socks. The style is excellent too, with a classic Crocs vibe but more casual and unassuming. I don't have too many steps in these yet, but so far they are holding up nicely as well. They are easily my favorite style and I highly recommend to others!