Envelope C5 Sigel DU251

The Sigel DU251 envelope is a C5 size envelope (162 x 229 mm) manufactured from high-quality white paper. Supplied in a pack of 50, this envelope is designed to hold folded A4 sheets or A5 documents without extra folding, offering a clean and professional presentation for mailings, invoices, letters and printed materials. The paper construction provides reliable protection during transit while maintaining a lightweight profile for efficient postage.

Advantages

The envelope combines consistent dimensions and a smooth white finish for a neat appearance. Its paper weight and construction provide enough stiffness to protect contents from bending while remaining easy to fold and seal. A uniform cut and reliable flap ensure consistent closure and compatibility with standard office sealing methods. The neutral white color integrates with both corporate and personal stationery.

Suitable for

• Mailing folded A4 documents and A5 brochures
• Sending invoices, statements and official correspondence
• Office filing and internal document transfers
• Mailshots, invitations and print materials

Key specifications

• Format: C5 (162 x 229 mm)
• Material: white paper
• Pack size: 50 envelopes
• Closure type: standard gummed/sealable flap
• Suitable for: folded A4 or A5 documents

How to use

Insert folded documents or print materials into the envelope so they lie flat and align with the envelope edges. Moisten the gum strip on the flap or use an appropriate adhesive strip if available, then press the flap firmly to seal. For bulk mailings, stack envelopes evenly and use automatic sealing equipment if compatible; otherwise, seal each envelope by hand following standard mail-preparation procedures.

Usage recommendations

Store envelopes in a dry, cool place to prevent moisture-related warp or adhesive degradation. For important documents, consider an inner protective sleeve or additional padding to reduce bending during transit. Check postage rates for C5 envelopes to ensure correct mailing costs.