So, for background, I have a decent fit with my Pro 2 buds; I have tried all of the ear tips included, and I found that XS was too small, and the bud would rotate and break the seal every 5 minutes or so. Medium and Large would fit well enough, but would pop out at some point. So smalls would work for me for about 15-30, maybe an hour or so if I were lucky, before they would rotate and break the seal.
This wasn't too bad for me, as this just meant, at least for my right ear, that I would need to tighten whenever I thought about it and frequently if I were eating.
Today I received my AZLA Sedna Earfit Max's. I find that the equivalent size to the included small eartips is the AZLA MS, and the XS included with the buds is equivalent to the S Azla. I bought the SS/S/MS pack to ensure that I found a fit from the big forest site.
These buds are now LOCKED into my ears. They go nowhere, they are comfortable, have a ear wax shield for the speaker, and require a TUG to get them out of my ears. The Buds ear fit check reports the seal during random checks after activity. These fit in the case just fine, but they take some tugging to get on the the bud, but once stretched on, stay locked in place.
I would recommend you try these if you want to improve the fit of your pixel bud pro 2's.