Quality Park Index Flat File – File – 9 1/2″ Width x 11 3/4″ Length – 110 lb – 100 / Box K734 Index Flat File Envelopes feature a 9-1/2″ x 11-3/4″ size and are great for transporting, filing and storing documents, proofs or artwork. Large, ungummed flap allows repeated use. 110 lb. manila stock is super-strong to withstand handling.