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Each sheet of 3M Micro Graded Wet/Dry Polishing paper assortment is 8-1/2″ x 11″. Each grade is color coded for easy identification and is listed below from finest to coarsest. Micron / Color / Abrasive 1 / white Aluminum Oxide 2 / aqua Aluminum Oxide 3 / pink Aluminum Oxide 9 / light blue Aluminum Oxide 15 / gray Silicon Carbide 30 / green Silicon Carbide