ELCO Envelope Classic C4 – Eco-friendly envelopes with window for professional mailing
The ELCO Classic C4 envelope is a high-quality window envelope ideal for sending A4 documents without folding. With 250 pieces per pack, it is particularly suitable for offices and companies with high postal traffic.
FSC®-certified paper for sustainable forestry – ship ecologically
C4 format for unfolded A4 documents – documents remain crease-free
Convenient window on the left – address field stays visible and writable
White envelopes for a neutral, professional appearance
Pack of 250 pieces – cost-effective and sustainable for continuous use
What sets the ELCO Classic C4 envelope apart
The Classic series from ELCO represents reliable quality from Switzerland. The FSC certificate confirms the use of paper from responsible sources. The envelope is optimized for daily office use: paper strong enough for secure mailing, but not overly heavy to save on postage costs.
Ideal for...
This envelope is the first choice for companies, authorities, and organizations that regularly send A4 documents – from invoices to offers to contracts. Thanks to the left-hand window, it is particularly suitable for left-window configurations used in many common printing and inserting systems.
How to use the ELCO Classic C4 envelope
The envelope with left window is designed for standard use: fold back the flap, insert the document, and seal the envelope with a damp sponge or glue stick. The window film protects the window and keeps the address visible. Ensure the address is correctly aligned in the window (left-aligned for left window).
ELCO is a traditional Swiss manufacturer of stationery and envelopes based in St. Gallen. The brand stands for high-quality, sustainable office supplies made in Switzerland. The Classic series is the standard line for everyday needs in companies and authorities.
It is an envelope in C4 format (229 × 324 mm) with a window on the left side. The pack contains 250 pieces made from FSC®-certified paper.
The envelope is ideal for unfolded A4 documents such as invoices, offers, contracts, or brochures. Thanks to the window, the address can be placed directly on the document.
The window is on the left side of the envelope. Make sure to position the address on the document left-aligned.
Yes, the paper is FSC®-certified and comes from responsible sources, supporting sustainable forest management.
A pack contains 250 pieces. The total weight of the pack is approximately 5.2 kg.
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