This is a set of 10 two-sided tokens. Drawing a token at random and flipping it has the same chance to roll 1-20 as rolling a D20! The numbers are paired the same as opposite faces on a D20. This means that extreme numbers (like 1 and 20) are paired, while middling numbers (like 10 and 11) are as well. All pieces are 3D Printed in a marbled PLA and shipped to you from a 3D printing facility!