None of us have any control over how our maker endowed us. Many big guys don't know how to handle their equipment. If a woman judges only by dick size, then she is in for a lot of disappointments. Further if that is her only requirement, are you sure you want to play with her anyway?
I am of average size and have been to plenty of events and parties where I was among the nude throng. I learned not to worry about that and focused on showing a big personality instead. I usually get selected for play by a lady or two and while they may not be 10's, neither am I, so I try to "stay in my lane"
It is a difficult conversation to have, but finding a way to mention your other attributes is a good start. Having your wife or another playmate vouch for you with something like "You should see it when he gets going!" or similar endorsements helps.