This is a project that I found on the Lulzbot website: a functioning wristwatch (the original project can be found here: https://www.lulzbot.com/learn/tutorials/make-time-3d-print-functional-wrist-watch). There are multiple sizes for the watch band, so be sure to select the one that fits.
DISCLAIMER: I can take not credit for this project. The files, the images, and the instructions are made by Lulzbot.