a die (singular of dice)
21 dots on a standard die
A dice has 21 spots (pips) but is never ill.
21 spots on a dice
21 Spots on a Die
There are 21 spots on an ordinary die.
21 spots on a dice
A ladybug typically has between 5 and 21 spots.
21
The cast of 21 Sinful Vegas Hot Spots - 2008 includes: Richard Wilk as himself
There are 1+2+3+4+5+6 spots or 21 total.
Answer: I think that a piece of paper with 21 dots
21.