This penguin keychain is easy to print and fits regarding the size to your bunch of keys. It has an approximate size of 50mm. The hole in the neck is for the ring holding the other keys.
Printer:
A8
Rafts:
No
Supports:
No
Resolution:
0.1 - 0.2 layer thickness
Infill:
100%
Notes:
The printing speed depends on your 3D-Printer. As it's not that big at all, I printed it with 30mm/s (Anet A8).
