Is the same as any place else. It's all relative to dick size. If you're packing a Pepperoni, there are going to be a lot of tight girls. If you've got a Vienna sausage, there's going to be fewer.  Maybe if you post your dick photo, the providers themselves can answer your question as to who might be tight for you.

Try reading this link.
https://www.psychologytoday.com/blog/all-about-sex/201109/the-rare-truth-about-tight-and-loose-women
Arousal has a lot to do with it.