I’m in a FB group that does what they call deconstructed art journal pages. Instead of swapping whole journals which is expensive not to mention if you don’t get your journal back!!! They swap single pages that are 8”x8” in size. Some require you decorate both sides and some only once side.
The idea is you will collect them and the bind yourself into a book.
I found the size interesting to work with.
These are the first 2 I have made. The first one is 2 sided.
The second one is one sided