Crystal clear viewing measuring 12x18" Keep your collection clean and safe Pack of 25 toploaders per box New size added for lithographs Opens on Short Side Guardhouse top loader sleeves. Exterior dimentions are 12x18"x5mm, with a 3/16 inch opening. Protect your collection with high quality Guardhouse toploaders. Guardhouse Toploaders#: 1218TL. Size: 12x18x5mm. Color: Crystal Clear. Sold in Packs of 25. Case Qty: 100 .