Yubikey 5 Sleeve for Colour Coding and Protection

thingiverse

This is a slim protective sleeve designed specifically for the Yubikey 5 or Yubikey 5 NFC (and possibly other models as well). Its main goal is to colour code different keys, but it also offers some protection and, if you choose a bright color, might make them slightly less easy to misplace. It has 0.2mm clearance all around, and was a fairly snug fit on the two that I tried out. There are three different variants available. The fully enclosed type (A) may be difficult to remove, whereas type (B) and type (C) have an opening at the rear to aid in removal.