Tailors Chalk (Wax Tailors Chalk) ~ White ~ 48 Pieces/box Tailors Chalk (Wax Tailors Chalk) ~ White ~ 48 Pieces/box Tailor'S Marking Crayons They mark smoothly, sharpen easily, and produce clear lines that melt when pressed. Each square measures 45mm X 38mm X 5mm (1-3/4" X 1-1/2" X 3/16"). White chalk can be removed with a hot iron