Add to cart
Grey Mailing Bags | 16 x 21 Inch | Medium Parcel Size Grey Mailing Bags | 16 x 21 Inch | Medium Parcel Size £3.99 – £36.99Price range: £3.99 through £36.99
Grey Mailing Bags | 4 x 6 Inch | Royal Mail Large Letter Size Grey Mailing Bags | 4 x 6 Inch | Royal Mail Large Letter Size £0.99 – £6.99Price range: £0.99 through £6.99

Grey Mailing Bags | 6 x 9 Inch | Royal Mail Large Letter A5 Size

Professional Shipping Solutions – 6 x 9″ Grey Mailing Bags

What fits in this bag?

  • Small Apparel & Accessories: Socks, beanies, underwear, and lightweight scarves.
  • Small Items Cosmetics, phone cases, jewelry pouches, and small electronics.
  • E-Commerce: Ideal for eBay, Vinted, Depop, and Etsy sellers shipping non-fragile items.

Also available in our mixed size packs

£0.00(0.0p/bag)
Add to Cart
Grey Mailing Bags | 6 x 9 Inch | Royal Mail Large Letter A5 Size
Grey Mailing Bags | 6 x 9 Inch | Royal Mail Large Letter A5 Size
£1.49 – £13.29Price range: £1.49 through £13.29
Total: £0.00
🚚
Same-Day Dispatch
Orders before 1pm
📦
Postal Approved
Royal Mail & Small Parcel
🛡️
Heavy-Duty Poly
Tear-resistant & recyclable
Guaranteed Safe Checkout

Professional Shipping Solutions – 6″ x 9″ (150 x 225) Grey Mailing Bags

Upgrade your shipping game with our premium 6″ x 9″ (150mm x 230mm) Grey Mailing Bags. Perfectly sized to meet Royal Mail Letter & Large Letter guidelines for compact items, these bags are the ideal choice for e-commerce sellers looking to combine professional presentation with maximum postage savings.

Why Choose Packaging365 Grey Mailers?

  • Maximum Postage Savings: Sized specifically for smaller goods like jewelry, cosmetics, phone cases, and socks. By keeping your shipments compact, you minimize postal dimensions to keep costs as low as possible on every dispatch.
  • Professional & Opaque: Featuring a dark inner lining, these bags provide 100% opacity to ensure total privacy and a clean, professional look upon delivery.
  • Ultra-Strong Protection: Manufactured from durable, co-extruded polymer, our bags are puncture-resistant and waterproof to keep your items safe and dry in transit.
  • Tamper-Proof Seal: Our high-tack permanent self-seal adhesive strip creates a secure bond that cannot be opened without visible signs of tampering.

Perfect For:

  • Small Apparel & Accessories: Socks, beanies, underwear, and lightweight scarves.
  • Small Items: Cosmetics, phone cases, jewelry pouches, and small electronics.
  • E-Commerce: Ideal for eBay, Vinted, Depop, and Etsy sellers shipping small, non-fragile items.

Also available in mixed size packs

Technical Specifications:

  • Size: 6 x 9 inches (150mm x 230mm approx)
  • Quantity: Packs of 25 to 500
  • Material: 100% Recyclable LDPE (60 Micron thickness)
  • Closure: Permanent Self-Seal Strip
  • Color: Professional Opaque Grey

Additional information

Weight0.1 kg

Reviews

There are no reviews yet.

Be the first to review “Grey Mailing Bags | 6 x 9 Inch | Royal Mail Large Letter A5 Size”

Mailing Bags Size Guide

Packing a t-shirt in a grey mailing bag

Not sure which bag you need for your Vinted or eBay sales? Use our mailing bags size guide below to find the perfect fit for your items. All our bags are lightweight to help you stay within Royal Mail and Evri weight limits.

Quick Reference Chart

Bag Size (Inches)Metric Size (mm)Best For…Royal Mail Format
9 x 12″225 x 300 mmT-Shirts, Leggings, Thin Summer Dresses, A4 DocumentsLarge Letter (if < 25 mm thick)
12 x 16″300 x 400 mmThe “Workhorse”: Hoodies, Jeans, Coats, Small Shoe Boxes, Small BundlesSmall Parcel
16 x 21″400 x 525 mmWinter Coats, Boots, Larger Shoe Boxes, Multi-item “Bundles”Small/Medium Parcel

🧥 Which bag for my item?

  • T-Shirts & Tops: Most single t-shirts fit perfectly in a 9×12″ bag. If the fabric is very thin, you can often keep this under 2.5cm thick to post as a Large Letter, saving you nearly £2.00 in postage!
  • Jeans & Trousers: Adult jeans are bulky. We recommend the 12×16″ bag. It allows room for the denim to be folded without putting stress on the seams.
  • Hoodies & Knitwear: For a standard adult hoodie, go for the 12×16″. If it’s an extra-thick “oversized” hoodie or a winter coat, move up to the 16×21″.
  • Vinted Bundles: If a buyer has bought 3–5 items, the 16×21″ is your best friend. It’s heavy-duty and large enough to keep everything together in one secure package.

📏 Top Packing Tips for Sellers

  1. The “Air Squeeze”: Before sealing the bag, press down to remove excess air. This makes the parcel flatter and less likely to get caught in courier machinery.
  2. The Fold Test: If your item is right on the edge of two sizes, go for the larger one. You can always fold the excess plastic over and tape it down, but you can’t stretch a bag that’s too small!
  3. Check the Depth: Remember, Royal Mail “Large Letter” is about the thickness (25mm), not just the width. If your t-shirt is folded too “fat,” it will be charged as a Small Parcel.
SKU: GMB6X9 Categories: , , Tags: , , , , ,

Related products