10 inch x 13 inch commercial booklet style envelopes are used for booklets, catalogs, brochures, pamphlets, sales magazines, annual reports or multiple page documents that you want to ship flat. The opening of this commercial booklet envelope is on the 13” side, making it easy to insert the documents. These also come in an open end. Please see booklet 10x13 open end. These envelopes are inkjet and laser printer safe.