This Glass Grinding Plate offers the ideal surface for making or mixing paintsor for use as a palette! Its four rubber feet provide ample stability for grinding pigments to your desired coarseness and then slowly grinding-in an oil- or water-based binder to achieve a super smooth paint texture. Crafted from tempered glass, its 17"L x 11"W surface resists breakage for long-lasting durability. - Glass Grinding Plate - x 11-1/4".