Walnut Stocking Sizes: 1/2" A-1 4' x 8' MDF Core Domestic 3/4" A-1 4' x 8' MDF Core Domestic 3/4" A-1 4' x 8' Classic Core Domestic 3/4" A-1 4' x 10' MDF Core Domestic 3/4" A-1 4' x 10' Classic Core Domestic 5.2mm A-1 4' x 8' MDF Core Important (1/4")