Cream / Natural / Off White,Heavyweight Blank Note Cards and Envelopes Size 5 X 7 or 4.5 X 6 - 50 Per Pack. - This Is Not a Fold Over Card. (4.5 x 6) 50 Blank Greeting Note Cards & Envelopes - This Is Not a Fold Over Card. Sets are compatible with most inkjet and laser computers Cards are 5"x7" or 4.5" x 6" in size, 80 lb cover The Envelope is 70 lb. Text. Save money by making your own Invitations, Announcements, etc. Envelope Size 5 1/4 x 7 1/4 - Envelope is square flaps.