Southworth 25% Cotton Linen Envelopes (SOUP56410) Always mail your documents in a matching linen finish envelope for a mailing that demands attention; Crisp classic linen texture with cotton fiber for added durability Compatible with laser and inkjet printers; watermarked, 25% cotton fiber; 24 lb. Size: No. 10; 9-1/2" x 4-1/8"; Ivory