I don't know if pussy size is based on body size, but I think most men wants a tight pussy. That being said, so long you have a decent size dick (length and girth), if you know how to use it and got stamina, you should generally be able to make a woman cum. I prefer a woman to be tight, but have some depth because I love to bottom-out. I once experienced a female that was tight, but not too deep. I still enjoyed myself, but I had to pay more attention not to cause pain. But eventually she was able to adjust. If the pussy is not "abnormally" loose, skills and positioning will generally workout. But we all love tight pussy. What's tight for one man, could be loose for another so it's subjective.