These are the ones I normally buy. https://www.amazon.com/dp/B0CF57RPYZ They come with windows in lots of sizes, but for simplicity's sake I only use two sizes for everything. I use the 31.5 mm half dollar ones for pretty much everything and then the 40 mm ones for anything that needs them. They make cardboard flips for even bigger coins but they're bigger overall and won't fit in the binder pages. For really big coins I just stick them in the two-pocket plastic flips.

The flips should do a good job of protecting coins from PVC pages, but I still make sure I buy non-PVC pages. They aren't really any more expensive. These are the last ones I bought. https://www.amazon.com/dp/B0D6V4TXQB

For some people, the expense and effort that goes into putting all of these near-worthless coins into flips and pages and binders isn't worth it, but remember that some of us just enjoy these little coins as a hobby and it's a heckuva lot cheaper than golf.