JAM PAPER Plastic Envelopes with Button & String Tie Closure - Letter Booklet - 9 1/8 x 13 - Two-Tone Light Blue - 12/Pack Light Blue Two-Tone Button & String Envelopes Size: Letter (9.75 x 13 inches) Quantity: 12 Envelopes per Pack Envelopes are made from durable plastic, are scratch and tear resistant, and have a button & string closure Perfect for securing, protecting, and storing documents at home, in school, or at the office!