This is a thirty-one-sided die (d31) made by truncating a sphere with 31 equally-sized landing positions. The design is based on optimally packing circles on a sphere and is five-fold symmetric. The six groups of five numbers at 72° sum up to 80.
For ease of recognition, the dice in this series are by default only available in full color, with base color according to the last digit of the highest number (1 = vivid yellow). Other colors may be requested.
Click here to view all the dice currently available in this series
For other speciality polyhedral dice check out:
Impact! Miniatures, The Dice Lab (mass-produced)
Odd Ball Dice, PropModule, The Magic Shop (Shapeways)