Blue Opaque Dice with White Numbers D3 (D6 1-3 Twice) 16mm (5/8in) Pack of 4 Wondertrail Blue Opaque Dice with White Numbers D3 (D6 1-3 Twice) 16mm (5/8in) Pack of 4 Wondertrail Pack of 4 Dice 16mm six-Sided (d6) These dice have numbers for 1 - 3 twice Dice are 6 sided dice and approximately 16mm - 5/8in in size. NOTE: Colors may vary slightly depending on your monitor settings.