I've been playing around with different ways to keep ACEOs in an album. (ACEO's are pieces of art where the only rule is that they measure 2.5 x 3.5").
I firstly started with just a basic book where I personally mounted ACEO's myself with double sided sticky tape.... but thinking about it, it's actually quite a disorganised way of doing it.
Then I came up with using transparent photo corners, which worked out quite well.I also did another where I also included ACEO sleeves within the corners so they were spaced out a bit further than the other.
Finally, I developed a neat, professional way of mounting the sleeves straight into the book using permanent adhesive dots placed in the sleeve corners, so the book ends up being more like an album. I love it! Although it is extremely costly as an entire book holds 204 ACEOs, which means 816 adhesive dots to use!! You can order one via my Etsy Shop which I can also customise for you!