Winsor & Newton Professional Smooth Canvas 30inch x 24inch Box of 2These Professional Smooth Canvas from Winsor & Newton are carefully selected and meticulously prepared to ensure outstanding quality. The cotton duck canvas is stretched over the professional 18mm stretcher bars to give incredible tactile strength and stability while your working on it's surface. Every canvas measures 30" x 24" with a heavier weight to them, a medium grain 280gsm and are all triple primed with two coats of primer and a coat of sizing