I made these to be super accurate models of the That's VX90 and Maxell UD XLII blank cassette tapes.
I designed them with resin printing in mind, but they would probably print well on an FDM machine if the scale wasn't too small and you were able to figure out support.
I'm including a life size version of each, and a scaled down version with a hole for a keychain.
The author marked this model as their own original creation.