I'm very new to this and just starting to play around with pegging, in part as an agreement with a new partner that we would embark on anal play together, she suggested she wanted to try it, but never had and wanted to know if I would try it myself too. I'm kinky, so why not. Which brings me to my question.

I'm average sized myself, 5.5 long with 5.5 girth. If we are playing with a toy I suspect the idea is to have something similar in size to my dick (used on her) used on me. But looking at toys with similar girth to mine it feels like that is a lot to get inside me. I've seen some longer thin toys too, so I'm wondering from those with experience, is there any meaningful difference in how hard it is to take a toy that is deeper vs wider?