THIS IS AN OLDER DESIGN. CHECK OUT THE SECOND-GENERATION CASES: https://www.thingiverse.com/thing:4896698

(For some reason it doesn't seem to be showing up in searches or even on my own profile.)

Here are three sizes of CPU display cases that I made!

The 35mm x 35mm cases fit Socket 478 processors only as far as I've tested, while the 40mm x 40mm fit almost any modern AMD desktop CPU. The 50mm x 50mm cases fit everything ranging from Socket 5 and 7 CPUs to Socket A and 370, not counting the Slot-1/A designs that Intel and AMD used for a short time.

Instructions for proper dimensioning are given in the relevant "case notes" text files! If you feel like these cases don't protect your CPU collection well enough, there's enough room to fit a thin piece of antistatic foam on the bottom to keep the pins protected.