Gusset Envelopes – Plain & Window Shop our range of gusset envelopes, designed for sending thicker documents, reports, brochures, folders and paperwork that may be too bulky for a standard flat envelope.
Expandable side gussets provide additional capacity, allowing the envelope to accommodate a greater volume of paperwork while still providing the convenience of a traditional mailing envelope. Our range includes C4, C5, C6 and B5 gusset envelopes in white and manilla finishes, with both plain and window options available. C4 Gusset Envelopes C4 gusset envelopes are ideal when you need to send A4 documents without folding but require more capacity than a conventional C4 envelope can provide. They are particularly useful for reports, contracts, legal documents, brochures, folders and larger document packs. Our range includes white and manilla C4 gusset envelopes, with plain and window options available. C5 Gusset Envelopes C5 gusset envelopes provide additional capacity for A5 documents or A4 paperwork folded once. They are a useful choice for businesses sending thicker correspondence, statements, document packs and other paperwork where a standard C5 envelope may be too restrictive. C6 and B5 Gusset Envelopes For smaller or less conventional mailings, we also stock selected C6 and B5 gusset envelopes. These provide the same expandable design in alternative sizes, giving businesses more choice when selecting the right envelope for their documents. Plain and Window Gusset Envelopes Choose plain gusset envelopes when addressing the envelope directly or using labels, or select a window gusset envelope when the recipient address is printed on the enclosed document. Window options can help streamline the preparation of invoices, statements and other business correspondence. White and Manilla Gusset Envelopes Our gusset envelope range includes both professional white finishes and practical manilla options. White envelopes provide a clean appearance for customer-facing correspondence, while manilla envelopes are a popular choice for general business, legal and administrative documents. Peel & Seal Gusset Envelopes Many of our Blake gusset envelopes feature a convenient peel and seal closure. Simply remove the protective release strip and press the flap into position, providing a quick and convenient way to prepare thicker mailings for despatch. Gusset Envelopes for Bulky Documents Expandable envelopes are particularly useful for: Reports and presentations Contracts and legal documents Brochures and catalogues Accounts and financial paperwork Document folders Educational materials Multiple-sheet correspondence General business and office mail The expandable construction provides additional space where ordinary flat envelopes may not offer sufficient capacity. Buy Gusset Envelopes Online At Online Stationers, we supply plain and window gusset envelopes in a range of sizes, colours and paper weights for businesses, schools, solicitors, accountants and organisations throughout the UK. Choose from C4, C5, C6 and B5 formats in white or manilla, with both plain and window designs available. For other mailing requirements, browse our board backed envelopes, corrugated mailers, padded envelopes and wider range of business envelopes and mailroom supplies.
