16 x 21 inch Grey Mailing Bags

High-Quality Mailing Bags for Secure UK Shipping

When it comes to e-commerce, your packaging is the first physical touchpoint with your customer. At Packaging 365, we provide a comprehensive range of mailing bags designed to offer maximum protection while keeping your postal costs low. Whether you are a boutique Etsy seller or a high-volume eBay powerhouse, our mailing solutions ensure your items arrive in pristine condition.

Our 16 x 21 inch grey mailing bags are the heavy-duty solution for your larger non-fragile shipments. Designed to accommodate A2-sized items, bulky textiles, and multi-product orders, these extra-large mailers provide a secure, professional, and remarkably cost-effective alternative to oversized cardboard boxes.

Why Choose Our Poly Mailers?

Our mailing bags are engineered for the rigours of the UK postal system. Key features include:

• Tamper-Evident Seals: High-tack self-adhesive strips ensure that once your package is closed, it stays closed.
• Tear & Puncture Resistance: Made from durable co-extruded polyethylene, our bags protect against scuffs and rough handling.
• Waterproof Protection: Keep your goods bone-dry, regardless of the British weather.
• Lightweight Efficiency: Our bags add negligible weight to your parcels, helping you stay within lower postage brackets.

Finding the Right Size for Your Business

From small 6×9 inch bags perfect for jewelry and cosmetics to extra-large 24×36 inch sacks for bedding and coats, we stock the full spectrum. If you are unsure which size fits your product, we recommend measuring your item’s length, width, and depth, adding 2cm to each for a comfortable fit.

Eco-Friendly & Professional

Available in our signature grey mailing bags for a classic professional look, or specialized heavy-duty options for fragile items. We are committed to providing packaging that balances strength with sustainability, helping you reduce your environmental footprint without compromising on security.