Outside diameter of rolls: 2.75" (1" core). Badge size: 2.8125" x 1.9375". # badges/pack: 1,000 (4 rolls of 250 badges) 

Choose a clip-on back piece, or self-adhesive back piece. Your choice of back piece is included in the price.

Two-Piece Activation. To activate the color-changing process, remove the white Front Piece from your printer and attach it to the red Back Piece.  This starts the timing process.