JAM PAPER #10 Policy Business Premium Envelopes - 4 1/8 x 9 1/2-25/Pack Color: Navy Blue Size: #10 (4.13 x 9.5 inches) Quantity: 25 envelopes per pack These Envelopes are fashioned from High Quality 28lb paper, has a gummed straight flap, and a smooth finish! Perfect to use for sending invitations, greeting cards, RSVP's, thank you cards, gifts for birthdays, graduations, holidays and more