These are made up of special paper like Metallic or Textured papers. They are popularly used for mailing Wedding cards or Invitation Cards.
Envelopes are available in various colours and texture so as to match with the card. In the era of digital printing these envelopes are of utmost importance as they allow theme synchronization even for smaller quantity of wedding/invitation card.
They are available in two sizes: 9×6 (potrait opening) and 7.5×5.5 (landscape opening).