Smead® Poly envelopes in red color with string tie closure are ideal for use in the home office or classroom. Store important documents in these acid free archival quality envelopes. Colorful super durable polypropylene resists tears and repels moisture making these envelopes great for keeping everyday papers organized too. Each poly envelope expands to 1-1/4 to hold up to 200 sheets of letter size papers. Closed on three sides with a string-tie closure Smead Poly envelopes ensure contents are kept inside and allow for secure and safe transport. Envelope has a dimension of 9 3/4 x 11 5/8 with horizontal orientation.