ValueX Pocket Gusset Envelope C4 Peel and Seal Plain 25mm Gusset 140gsm White (Pack 125) - 9000
ValueX Pocket Gusset Envelope C4 Peel and Seal Window 25mm Gusset 140gsm White (Pack 125) - 9001 - Gosh Office Colchester
Q-Connect Padded Gusset Envelopes C5 229x162x50mm Peel and Seal White (Pack of 100) KF3530 - Carlisle Business Supplies
Reinforced Gusset Envelope B4 Size (Larger than A4) 4 cm Gusset Peel and Seal Pack of 25 250 x 353 x 40 cm : Amazon.co.uk: Stationery & Office Supplies
220x110x25 White Gusset Envelope P/S 120gsm Opaque
C4 Gusset Envelopes 229 x 324 x 25mm - McKinleys 2019
GUSSET Envelopes printed in UK from £156 | TradePrintingUK