JAM Paper 4" x 9.5" White Commercial Window Envelope, Bulk are perfect for business and personal use. Simply insert invoices, statements, letters, and more without having to address each, as the window does the job for you! Staying both business appropriate and versatile has never been this easy. Details:White4.125in. x 9.5in.Made from 24lb. paperSmooth finishBooklet openingStraight flapGum closureAvailable in multiple bulk counts