This is exactly what I was looking for. I use it to hold stitch markers for crochet. They fit perfectly and it is slim enough to fit with my crochet hooks.
I really like this design. I plan to replace the decade old ones I've used with these printed in several colours.
I will however agree with others feedback about the lid. It won't fit without some sanding with fine grit sandpaper.
model prints nicely but the lid cannot slid in the base without great difficulty. I print this twice at least the bottom and still I couldn’t get the lid to slid. It appears there is insufficient space for the lid.