Heavyweight Blank White Half Sheet (5 1/2" x 8 1/2") Cards with Envelopes - 40 Cards & Envelopes Flat Cards (non-folding) are great for making Invitations, Announcements, Photos, Postcards, and much More. Cards measure half sheet size (5 1/2" x 8 1/2") are made from a Heavyweight 80lb Cover White Cardstock (216gsm, 98 brightness) Envelopes are A9 size (5 3/4" x 8 3/4") - Made from 70lb Text - Feature a Gummed Square Flap Cards & Envelopes are both Printable with your Inkjet or Laser Printer 40 Blank White Cards & Matching White Envelopes per pack