I wanted to get some women’s take on this specifically, but anyone is welcome to respond

So my girlfriend and I are yet to have sex, but the relationship is heading that way. We’re both virgins (21m/f) so we’re obviously inexperienced, but my question has to due with girth

I am above average when it comes to girth, length is average, but my girlfriend is also physically quite a lot smaller than I am (approx 5 ft 3, I’m about 5 ft 11) - I’m basically just concerned / wondering how I can be cautious of this

Does the physical size difference of the individuals really make a difference?

Is having a bit more girth going to potentially pose a problem? Does her being smaller contribute to extra girth being/not being a problem?

I probably sound a bit like an idiot with these questions but I kinda am, so please tell me what you think

I left out my measurements as I didn’t want this post to seem like I’m just trying to brag about my size, it’s not like I’m packing a shlong or anything, but I’m not unwilling to disclose it either.