Here is my display design for keychains and other small items.

Two parts are included in the folder: the first, i.e. the keyring display, measures 180 mm long x 100 mm wide x 35 mm high. The second is instead the pedestal, which measures 99 mm long x 104 mm wide x 15 mm high

The two parts can be printed flat on the plate, so they don't need supports. After that you can easily assemble them without the use of glue or anything else.

You can also print only the first part (the one where to put the keychains) and hang it vertically on a support thanks to the upper ring (as shown in the second image)

The nice keychain tortellini you see in the first image are always my creation and you can find the 3d model on Cults3d at this link: https://cults3d.com/en/3d-model/jewelry/cute-tortellini-keychains

Enjoy ;)