C6 White 90gsm Self Seal Wallet Envelopes (Qty 1000) 114mm x 162mm1 2 day delivery as standard on this product Our everyday business envelopes in white are a great option for any customer looking for a cost effective envelope without compromising on quality. In a 90gsm paper, these white envelopes are a self seal closure and in an industry standard size of C6 114mm x 162mm. Measurements displayed are all internal.