C4 White Gusset Window 140gsm Peel & Seal Envelopes. C4 size envelopes, so designed to fit A4 papers/documents, with expanding gusset sides for extra capacity. Dimensions are 229mm x 324mm with 25mm gusset.
These envelopes feature an address window and a blue opaque security interior, so they are perfect for business documents.
Window position is 213mm up & 24mm from left.