Color coded pins BR -what a good idea! One color pin for the 2" strips another color for the 3" strips. One color for the wrong side another color for the right side. One color for row 1 blocks another for row 2 blocks another for row 3 blocks...quilters and seamstresses will love to find new ways to organize with colored pins! Fine sharp 1-1/2" pins with .6mm steel shaft.