Dilators are not intended to fit all the way inside your vagina. The extra length gives you some space to hold on to and to apply gentle upward pressure. The pressure gently stretches the tissues to achieve additional length or depth in your vagina.
The graduated diameters of the dilators in the set are intended to address narrowing of the vagina. Use the smallest one until it's comfortable, and then move to the next-larger size. We offer a more complete description of how to use dilators on our website.
I also encourage the consideration of vaginal moisturizers and localized estrogen to help keep the tissues healthier and more supple. That in combination with the dilators can give you more comfortable, faster, more lasting results.