This block features premium watercolor paper glued on two edges so that you can paint directly on the top sheet without taping or sizing. When your painting is dry, simply slide a dull knife or letter opener under the top sheet to release the glue and pull your painting free. Details:White4" x 6" (10.16cm x 15.24cm) sheet size6 blocks (15 sheets per block)140 lb./300 gsmHot press finishedBound on 2 sidesArchival and acid free100% cotton