Depends very much on the individual. I have always been a strapping 5' 8" as an adult, 42-44" hips, size 7 feet, but when I gave birth to my eight pounders I had to be cut first time and I tore the second (which was actually less painful afterwards).
But then I know one woman who is a tiny 5' and gave birth to a ten pounder without so much as a nick.
I remember a midwife saying that black and asian women tend to have more elastic skin than we white girls, and so have comparatively fewer problems in this area.