I went foam, and got these specific ones, because they're the only foam ones you don't have to pinch before putting in (so they can expand once in, a la diofit et al). That's a pain in the ass when you just want to pop them in for phone calls and whatnot. The seem a little smaller around the circumference when you look at them, until you realize they're only about 2/3 the height, so they're actually true to size in the ear. I've been very happy with them so far.

https://www.amazon.com/gp/product/B08YD42C7T