Heavyweight Blank White 4" x 6" Cards with Envelopes - 40 Cards & Envelopes Flat Cards (non-folding) are great for making Invitations, Announcements, Photos, Postcards, and much More. Cards measure 4" x 6" are made from a Heavyweight 80lb Cover White Cardstock (216gsm, 98 brightness) Envelopes are A4 size (4 1/4" x 6 1/4") - Made from 70lb Text - Feature a Gummed Square Flap Cards &amp; Envelopes are both Printable with your Inkjet or Laser Printer 40 Blank White Cards &amp; Matching White Envelopes per pack