Grey Large Mailing Bags 21" x 23" Strong Poly Postal Shipping Bags

High quality grey mailing bags, designed for secure, lightweight, and reliable shipping. Made from durable LDPE material, these poly mailer bags are tear-resistant, waterproof, and ideal for eCommerce sellers, small businesses, and everyday postal use. Featuring a peel & seal adhesive strip with approx. 40mm flap for secure closure. Please select your preferred pack size from the options available.

Key Features

• Size: 21" x 23" (530 x 585mm)
• Material: LDPE Poly (Plastic)
• Colour: Grey (opaque for privacy)
• Closure: Peel & seal self-adhesive strip with approx. 40mm flap
• Protection: Waterproof and tear-resistant
• Thickness: Approx. 50–60 micron
• Pack Sizes: 10, 25, 50, 100 or 200

Product Benefits

• Lightweight design helps reduce postage costs
• Strong and durable for secure parcel delivery
• Water-resistant surface protects contents in transit
• Secure closure with wide adhesive flap
• Professional appearance for online orders

Ideal For

• Clothing, accessories and soft goods
• Books, documents and small parcels
• eBay, Amazon, Etsy and online sellers
• Warehouse, office and fulfilment use
• Small businesses and startups

What’s Included

• Selected pack of 21" x 23" grey mailing bags

Please Note: These are flat poly mailing bags and do not include padding.

FREE UK Delivery – Fast dispatch within 1 business day

Simplz – practical products made simple.