The size information is not very helpful, the competition gives much better help with size information. The size "S" only fits my partner, it was a bit too tight for me. Here you could work with cm information, IF "40" as a size also refers to inches, then the maximum size is only the usual middle of the size information. The leather is genuine, not artificial leather. It is closed by a spike that is hooked into the hole. Doesn't that take the leather with it in the long run and widen the hole? It definitely holds up. Look good: Definitely, the buckle, which is particularly easy to use, appealed to me. It's just a pity that the black side isn't smooth, I like the dark brown side better except for the color. I see the turning function as rather useless, especially since the inside is probably a bit more stressed and becomes less attractive over time. For a suit I prefer two ratchet belts to match the shoes.