White paper envelope with a window, white C4 229x324

📩 White paper envelope with window C4 (229×324 mm) - 90 g/m², print and self-adhesive closure (SK)

Do you need an elegant and maximally functional envelope that will fit A4 documents without folding and allow for quick and precise addressing? White paper envelope C4 (229×324 mm) with window and print, made of offset paper with a weight of 90 g/m², is the perfect solution for offices, institutions, businesses and individuals. Thanks to the self-adhesive (SK) closure, you will seal it instantly without any additional steps, and the content will be properly protected and discreet.

🌟 Key features of the C4 (229×324 mm) envelope

• C4 Format: allows for sending full-sized A4 documents without folding, maintaining an immaculate appearance of letters and promotional materials.
• Address window: facilitates automatic addressing - just print the address on the document, which will be visible through the window film. You save time and minimize the risk of errors in manual writing.
• Weight 90 g/m²: offset paper of increased durability, thanks to which the envelope maintains rigidity even with a larger number of attached pages.
• SK closure (self-adhesive): without the need for moistening or tearing off the strip - just press the flap to permanently secure the contents.
• Internal overprint: ensures a high level of confidentiality, making it difficult to see the contents under the light.
• White color: universal, professional look that you can additionally diversify with a company print or a label with a logo.

📄 Applications of the white C4 envelope with a window

• 📑 Office and official documents: contracts, invoices, letters - fit in full A4 format.
• 📋 Reports and offers: allow to maintain a professional appearance in correspondence with clients or contractors.
• 📢 Promotional materials: folders, brochures and leaflets sent in mailing campaigns, with the address visible through the window.
• 📬 Bulk correspondence: thanks to the window, you can reduce time and effort in large volume shipments.

💼 Who will benefit from a C4 paper envelope (90 g/m², SK) with a window?

• 🏢 Offices, departments and institutions: accelerating the addressing and sending of important letters.
• 🛍️ Online stores and shipping companies: attaching invoices or other documents without unnecessary folding.
• 🎯 Marketing departments and advertising agencies: sending promotional materials in large quantities, with minimized number of errors.
• 🏠 Private individuals: sending works, certificates and other materials in A4 format, when convenience and safety are important.

⚖️ Why choose C4 with a window and an imprint?

This envelope variant perfectly combines the functionality of a large format with the convenience of addressing. The window allows to shorten the preparation process of shipments, and the internal print protects against unwanted viewing. The grammage of 90 g/m² gives the envelope rigidity and durability, which you will appreciate with a thicker package of documents.

🎨 Personalization and other possibilities

To make your correspondence stand out among others, order a custom company logo print, graphic motifs or colorful accents. Additionally, we offer:

• Custom-sized boxes - perfect for shipping larger items or materials requiring additional protection.
• Printed boxes - personalizing packaging to strengthen brand recognition and impress recipients.

All this will help you maintain a consistent company image at every stage of contact with the customer.

💬 Need an individual quote or larger quantities of envelopes?

Go to the PRO form to describe your requirements. We will be happy to prepare a tailored offer and advise on the selection of optimal solutions.

White paper envelope with window, C4 (229×324 mm), 90 g/m², SK closure and underprint - ensure a professional, convenient and safe form of shipping in every parcel!