Comment by bondarchuk

Indeed:

>Several individuals have suggested that the dodecahedra are knitting aids, specifically for knitting gloves, with different sized holes intended for the different sizes of fingers, and the pegs serving as a lattice to hold the yarn.

https://en.wikipedia.org/wiki/Roman_dodecahedron

But of course just because someone has managed to make a glove using one, does not really prove that it was their primary purpose.