D20 Dice, Icosohedron
thingiverse
It has always bugged me that the one D20 I found on thingiverse had the numbers placed incorrectly, so I made one. Each side on this is 100mm, so scale it percentage-wise to your desired dice size. The first file has 2mm deep numbers and is fine for larger dice, but I uploaded a second with 5mm deep numbers so it can be better shrunk.
Download Model from thingiverse
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