AirPod Pros are too big for my ears

I purchased AirPod Pros and I love them except they are too big for my ears and they keep popping out even though I'm using the smallest tip. Twice now they have fallen into water! Miraculously they still work but what can I do? I'm a normal sized adult but maybe I need a children's size AirPod? Does that exist? Is this a common problem?

[Re-Titled by Moderator]