Chessex Mini Translucent Green/White Polyhedral Dice Set (D20/12/10/%/8/6x2/4)

This is a Chessex CHX20375 Translucent Green With White Lettering Polyhedral Dice Set. The set includes d20, d12, d10, d10%, d8,  d6 and d4.

Size-wise, the d20 is about 12mm across.