Ideal for everyday business, JAM Paper Large White Square Invitation Envelopes provide versatility and ease for all your mailing needs. When you have larger mail that needs to be sent, these spacious envelopes do the job. Calendars, announcements, dinner invitations, and more lay flat and fold-free, keeping your mail professional.Details:White13.5" x 13.5"28 lb/75 gsmAvailable in assorted quantitiesSmooth finishSquare openingStraight flapGum closurePaper