Staples® First Class Self Seal #13 Envelope, 10" x 13", White with green diamond border, 100 Box Safety 5 Number of Sleeves: 12 58487 5 Number of Sleeves: 12 Pack Qty: 1 Paper Size: Letter Presentation Book Pack Size: 12 Sheet Length (Inches): 11 Sheet Width (Inches): 8 Approved for use on PSAT while the 28 pound white wove paper offers durability and a high contrast background for addresses and logos Brand Name: Staples Color Family: White Envelope Closure: Self Seal Envelope Flap Style: Square Envelope Number: Nonstandard Envelope Pack Size: 100 Per Pack Envelope Paper Finish: Wove Envelope Size: 10" x 13" Envelope Type: Catalog Envelope Window Location: None Height in Inches: 13 Material of Item: Paper Pack Qty: 100 Paper Weight in Pounds: 28 Security Tint: Untinted Series or Collection: First Class True Color: White with green diamond border Width in Inches: 10