Just got my first pair of 4" rock studs in the mail today and I gotta rave how comfortable these heels are. I was super worried and thought I should maybe have bought the kitten heel version but I tried them on and they were amazing which is a shock since I have pretty wide feet and usually end up with pinching or discomfort in some shape or form but with these not a bit. Also fit true to size. I'm size 7 and they fit perfect in 37.