Ideal for everyday business JAM Paper Large White Square Invitation Envelopes 25ct. 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:White10.5" x 10.5"25ct.Made from 28lb. paperSmooth finishSquare openingStraight flapGum closure