300 Letter size Laminating Pouches 3 Mil 9 x 11-1/2 inch with top 15% world high clarity rated clear glossy finish protects and enhances colors. 3 mils thick per Flap provides clear flexible low cost paper protection. Oregon Lamination Premium Letter laminating pouches have small radius rounded corners for a professional finish.OLP 9 x 11.5 Laminating Sleeves are metric size 229mm X 292mm and 75 microns thick per flap. OLP Laminating pouches provide the best deal value in polyester plastic laminating film with heat activated adhesive compatible in all thermal pouch laminators capable of sealing 3 mil 9 x 11-1/2 laminating pouches. Package includes at least 3 silicone coated laminating carriers to protect your pouch laminator s rollers from excess adhesive. Most laminating machines do not require a carrier, but we include it anyway.Card stock paper size recommended for these laminating pouches is Up To 8-3/4 x 11-1/4 for a 1/8 inch border of clear laminate around all sides of card and a secure sealed edge. ->TIPS: Industry standard specification for 3 mil laminating pouches is 3 mils on each flap for a total of 6 mils added to your paper sheet. Also, 1 mil equals 1/1000th of an inch (or 25 microns metric). The industry calls these laminating pouches when they are sealed on only one edge instead of three. They should be called laminating folders.-> PLEASE READ: Be sure "In Stock" says: "sold by Oregon Laminations Company". Otherwise, you are not getting Authentic Oregon Lamination Premium quality Laminating Pouches as listed; however, you can choose the #"new from" link to find the Only True Source of OLP fine Laminating Supplies.-> PLEASE do NOT post bad rating for these Laminating Pouches when you purchase from other sellers Piggy-Backing on this listing who must substitute Laminating Pouches of their choice. This unfairly harms the reputation of these fine OLP Laminating Pouches. Thank you in advance for understanding.