Sarah,

I am glad you found this site....I wish I had a clear answer for you.  Vaginal openings are different sizes for different people.  If you feel that there is a problem, then it is best to consult a OB/GYN physician.  Some women have a hard time even putting the smallest of tampons in,  that doesn’t mean that there is something "wrong".  Again, there is no black & white answer.  I will tell you that while going through my gyn rotation this past few months that there are lots of differences with women’s anatomy.  Sorry i can’t give you a specific answer

jess