★ DETAILS: assorted sizes of pencils just as seen in images varying between 5 mm to 9 mm thickness with a maximum length of 90 mm approximately and they are cut from natural stone each piece can differ in size slightly. White in color. you can write, sketch and draw with these incredible lime stone chalks ★ USES: These pencils are fantastic for the chalkboard, marking fabric and writing on metal. ★ ALL NATURAL: Our slate is cut from all natural lime stone to produce the absolute best chalk pencils with no impurities.