I scaled this up to be 100mm on the X and Y axis in hopes it would hold all my markers (it's tough to measure the inside opening) and unfortunately I can only get all but 1 marker in there. That's on me though as I made the sizing choice and could have gone bigger. It's disappointing the top/mouth isn't as wide as the base as normally they are or even wider which would have made the pen situation easier. This took just over 7 hours to print as I switched to the stronger gyroid infill and I slowed down the exterior wall to 50mm/s so the silk shine of my Creative rainbow silk PLA would pop. I sincerely appreciate this design and your contribution to the community.