I designed this from scratch based off of https://www.thingiverse.com/thing:1600919

This one was too small for my liking.

This fits in my 5x8.5 moleskine.

I used 1 wall and 2 top and bottom layers, though it will only print 3 at .2 layer height.

edit: After printing the spacing was a bit off, the new version v1.1, has .5mm less spacing between lines.