My kids are addicted to dinosaurs so every time I get a roll of filament I print them a large scale Robber Rex https://www.thingiverse.com/thing:613445 as well as a normal scale one to use as a color sample and then number and log it on a spread sheet. Well now that I have 70 some rolls of filament I was running out of space so I designed this stand to hold 40 of them. There is a recess for it to sit down in so they don't move around and attack people walking past the shelf.
You'll need 24 M3x8 or M3x10 socket head allen bolts and M3 nylon lock nuts. The bolts slightly recess and so do the nuts. You can combine them together to make longer versions using just one side however there won't be supports for the shelf on one side if you do that but that only affects assembly. If you do it this way use M3x12 bolts through shelf, through center piece and into other shelf (this is how the picture of the assembled double one is)
I have included the Step files in case anyone wants to modify it to their liking.
Overall dimensions without Robber Rex on it - 202.5 mm wide, 161 mm high, 130 mm deep.
Amazon Basics PLA