White Windowless Vertical Flap Envelope A4

White Windowless Vertical Flap Envelope A4 – Professional Document Storage and Mailing Solution

In the operational management of every enterprise, storing internal papers or transferring important documents such as commercial contracts, bidding profiles, and financial statements always demands meticulous care and a high standard of professionalism. The White Windowless Vertical Flap Envelope A4 size stands as the perfect B2B stationery solution that meets strict criteria for both confidentiality and structure in the modern corporate environment.

Outstanding Advantages of the White Vertical Flap Envelope A4 Size

Standard dimensions optimized for flat documents

The product possesses spacious outer dimensions of 250 x 350 mm. This is the standard design specification dedicated to A4-sized documents or thick files. Thanks to this optimized storage space, office staff can easily insert the entire document straight inside without folding it, keeping the papers flat and intact when reaching partners or the board of directors.

Sturdy and thick 100gsm paper quality

Unlike common envelopes on the market, our vertical A4 envelope is manufactured from premium white paper stock with a high weight of up to 100 gsm. This superior thickness brings a durable structure, minimizing tearing, wrinkling, or corner fraying during long-term storage or when being transferred through postal services and inter-office express delivery. At the same time, the smooth paper surface absorbs ink well, helping businesses easily print logos, stamp seals, or write recipient information clearly.

Windowless vertical flap design enhancing security

The vertical flap style (opening at the short 250 mm edge) combined with a flat front cover, completely free of any clear film window, helps completely conceal all information inside. This discreet design provides peace of mind for businesses when transferring accounting vouchers, personnel files, customer data, or strategic company information.

Convenient Options for Corporate Needs

To optimize the packaging workflow and handle tasks efficiently for the administrative department, the product offers two convenient solutions for the flap closure:

Unglued product line (Order Code 012546)

This version is suitable for businesses that regularly store internal documents, temporary files, or departments that want to actively use staplers or double-sided tape flexibly according to the thickness of the document package inside.

Double-sided tape integrated line (Order Code 012518)

Equipped with a pre-applied, super-adhesive double-sided tape strip on the vertical flap. Staff only need to peel off the protective backing and press lightly to seal the envelope securely, multiplying the packaging speed, especially during end-of-month periods for sending large volumes of notices or contracts.

Detailed Product Technical Specifications

Below is the official technical information table of the white windowless vertical flap envelope A4 size, helping the purchasing department easily select the correct order code: