Pack of 50 New C6 Size Cards & Envelopes in White. Card weight: 250 gsm. Envelope weight: 120gsm. 41 varied card blanks and envelope packs & sizes available in our eBay store. Various designs of blank Cards & Envelopes, including white & ivory packs in deckled, scallop and straight finishes in various sizes, black cards with white envelopes in various sizes, and mixed pastel cards with matching envelopes in various sizes. Country Of Origin: United Kingdom. Model Number: 382 273. Item Package Dimension: 11.4cm L x 16.2cm W x 0.1cm H. Item Package Weight: 0.61 kg.