The Princess Silver (90x145mm) 11B envelope 120gsm is perfect for an RSVP card, they will fit easily within either a DL or C6 envelope. Princess Silver is a silver metallic with a shimmer finish which is consistent on both sides and has a coloured core. Lick and stick to seal envelopes or use a damp sponge. It matches perfectly with the range of other envelopes, paper, card, folded cards, place cards, boxes, wallets & pockets in the Princess Silver range. We recommend a laser printer for all our shimmer papers, card & envelopes and suggest testing with your printer first.