How to work on thickness stretching?

Hi!! I just wanted to post here, that after suffering with vaginismus (diagnosed) for 5 years, I’m finally taking physiotherapy seriously and doing the self-exercises when I find the time. I’m proud to say I can finally fit size 5 of intimate rose EASILY. The length is 5 inches and the girth is 1.10inches. I looked online and the length is pretty much an average male genitalia, but the girth is still thinner than the average man. I was wondering; how can I work with being more comfortable with a thicker insertion? I’d rather not buy new dilators since I’ve already spent hundreds on the ones I have, so I was wondering how do you guys work on this aspect?

Thank you!!! :)))