This strap gives a really good support and helps you to control your instrument and avoid a sore neck.
But why not make it just a little bigger in order to make it one size-fits all. I'm a size 48 and the strap just fits me, so I'm not exactly unhappy, but I'd like just a little more room, so I could also wear a sweater or whatever.
Women even bigger than me won't be able to use the strap, it'll be too small.