Square Dance Checkers (also known as Choreos or Dolls) are usually little pieces of plastic, with colors and/or numbers that callers use to help write choreography and dancers use to help learn calls.

Many Square Dance Badge makers sell checkers.

I use checkers sold by Ed Foote. His snail mail address is:

ED & MARILYN FOOTE, 140 McCANDLESS DR., WEXFORD, PA 15090

(he does not have E-Mail)