The assumption here appears to be that all women have the same size vagina? Well that's just silly. Everyone comes in different sizes for all the other body parts: fingers, forearms, noses, ears, necks, thighs, torsos, feet, butts, thumbs, heads... Why would the vagina be the only body part that is the same in every woman? And even then, different women's preferences come into play. Some women enjoy the burning-itching sensation of being stretched to the extreme. Other women dislike it. There is no single answer that would apply to every woman.