10 x metallic gold lined envelopes DIN C5, anthracite, 156 x 220 mm, wet seal with pointed flap - FarbenFroh by Gustav Neuser. : Amazon.co.uk: Stationery & Office Supplies
5 x 7 inch Metallic Pearlescent Envelopes | 100 Multi-Colour 5 x 7 inch Envelopes
C5+ Metallic Gold Padded Bubble Envelopes [Qty 100] 180mm x 250mm – All Colour Envelopes
Padded Envelopes - Metallic Gift - A6 / C6 - 165mm x 140mm - Pack of 25 - eposgear.com
Metallic Silver Peel & Seal Envelope. 162mm x 229mm. 130gsm. Shiny Silver C5 Envelope (to fit A5).