Wilson Jones Sheet Protectors, Heavy Weight, Top-Loading, Clear, 100 Sheets/Box (W21411) CONVENIENTLY LETTER-SIZED  Convenient sheet protectors are a standard letter size, measuring 8-1/2 x 11. SINGLE-POCKET PROTECTOR  Single-pocket sheet protector allows you to easily slide your frequently-referenced documents inside, protecting them from moisture, and wear and tear. CLEAR POLYPROPYLENE  Convenient, clear protectors allow you to easily view and display your work. Sturdy polypropylene is acid-free and archival safe. HEAVYWEIGHT 3.3 MIL  Heavyweight protectors are designed to be strong, with 3.3 mil thickness. Non-stick coating also prevents ink from smudging or rubbing off papers onto the sheet protectors. 100 SHEET PROTECTORS  100 sheet protectors per box make an excellent addition to your store of office supplies.