That may be because, as with many things related to the vagina, much is misunderstood or left up to myth and urban legend. The average vaginal canal is 3 to 6 inches long, or about the length of your hand. For example, if you become sexually aroused, your vaginal canal grows longer. This allows your cervix and uterus to lift up and away from the canal so that penetration will be more comfortable. The vaginal canal undergoes many changes, and no two are same.
Vagina facts: How deep is a vagina and how wet does it get?
Brook McFadden, M. Combinining research on 50 samples from , McFadden decided to study the female anatomy of women, with an average age of 57 years. Your labia majora the outer lips are on average 8. The most common length tends to be the same size as a bottle of nail polish.
A person's height has no relationship to the size of their genitals -- or, in your case, on the length of the vaginal canal. The vaginal canal in any person isn't even one static size, anyway: it changes. When we're less aroused, the vaginal walls are tighter, and the back of the vagina and cervix are closer to the opening. When we become highly sexually aroused, the cervix pulls back, the back of the vagina "tents" and makes that canal longer, and the whole of the vagina and vaginal opening loosen. I also hope you understand that different couples have different "fits" when it comes to their genitals, and that when it comes to vaginal intercourse , a partner putting their penis into the vagina to the base of their penis isn't comfortable or always comfortable for every person with a vagina.
The dimensions and shape of the human vagina are of great importance in medicine and surgery ;  there appears to be no one way, however, to characterize the vagina's size and shape. Although the dimensions of the human vagina have not been the subject of intensive research to the same extent as research into human penis size ,  a number of research studies have been made of the dimensions of the human vagina. A study by Pendergrass et al.