Midnight Black Invitation A2 Envelope 100 Pcs, by Secret Life 4-3/8 x 5-3/4 Inches The pack come with 100 pieces of Black envelopes, each set are carefully packed for you to receive perfect condition product. The envelopes are exactly measured 4-3/8 by 5-3/4 inches, which make them official A2 size, All Envelopes are executive style diagonal Seam V-Flap construction. The Seal is designed to be moisture activated gummed seal, a little moisture goes a long way, convenience self sealing. These classic style Euro Flap Envelopes are made with black cardstock paper, they have contour flap that give each envelope a sleeker and more elegance look. Prefect for party, thank you cards, wedding, announcement, it's always good to have some of these on hand. 2018 NEW UPGRADE - These envelopes are made with 100 lb. (150gsm) Premium Ivory cardstock, not flimsy at all.