These are my second pair of Studio C Fairfax. The first pair I bought in 2019 and it was a size 41. I usually wear a size 40 but for those shoes it turned out 41 fit right. The first pair wore out so I ordered these second pair, also size 41. Unfortunately, these 41's are bigger than the previous. For an identical pair of shoes of the same make and model, you'd think the sizes would be the same. But no. It's poor workmanship by the manufacturer to be so inconsistent with their sizing.
Although these shoes are bigger, they're not falling off my feet when I walk. But they are roomy enough that I walk with a stiff ankle because they feel like they are about to slip off. So it would seem like these are true 41's (as I usually wear 40's) whereas my previous pair were faulty because they were smaller than a true 41.