Each box contains 100 plain banana paper business size envelopes, otherwise known as #10 envelopes. The exact size of each envelope is 4.25"x9.5". Our organic banana papers are made from combining tree free agricultural bio-products coupled with 100% post consumer content to create a beautiful paper that is laser printer compatible. Both the agricultural by-product of the plantations and the post consumer paper create serious solid waste problems worldwide--help combat both with these tree-free papers. Post consumer (PCW) - paper that has been used by consumers and collected through various recycling programs. It is also Process Chlorine Free (PCF) - paper has no bleached, chlorine or chlorine derivatives. A percentage of each sale goes towards an orphanage in San Jose Costa Rica. The use of banana papers helps conserve our natural resources Environmentally preferable — contains 10% Banana Fiber 100% post consumer recycled content. Trouble-free printing in your copier or in your inkjet or laser printer. Acid-free paper won't yellow or disintegrate over time.