The notes with this picture says these are 5" heels and they do look awesomely high so they probably are a true 5" foot-fall height heel.
Personally I actually don't like heels that look obviously seriously uncomfortable for the girl to be wearing. For me this dilutes the sexiness of the shoes. I know this is not the case for many men, but it is for me. I like to think the girl is not feeling that uncomfortable in her sexy heels that it ruins the enjoyment of the sexiness of them for her.
These heels don’t look too bad but they would certainly be on the edge of being just too uncomfortable for her to be feeling seriously sexy in.