Mixed Grey Mailing Bags Starter Pack – 30 Bags (A4, A3, A2 Mix)

£2.99

Contents: 10x A4 (9×12″), 10x A3 (12×16″), 10x A2 (16×24″)

Just starting out as a new seller on Vinted and Depop?
Not sure which size you need?

Our Mixed Grey Mailing Bags are the Ultimate All-in-One Shipping Solution for New Sellers.

Don’t get stuck with 100 bags of the wrong size. Our Mixed Size Starter Pack gives you the flexibility to ship anything from a single T-shirt to a heavy winter coat.

Designed specifically for Vinted, eBay, and Depop sellers, these professional grey mailing bags are 100% opaque, waterproof, and feature a “peel and seal” extra-strong adhesive strip.

What’s inside?

Bag Size	Quantity	Ideal For
A4 (9″ x 12″)	10 Bags	Small apparel, t-shirts, and accessories.
A3 (12″ x 16″)	10 Bags	Jeans, hoodies, and standard shoe boxes.
A2 (16″ x 21″)	10 Bags	Bulky jackets, bedding, and multi-item bundles.

10 in stock

This item is selling fast!

Why Thousands of UK Sellers Choose Packaging365

Royal Mail & Evri Ready: All our bags and boxes are tested against UK courier dimensions to help you avoid unexpected surcharges.
Dispatched in 24 Hours: We know your customers are waiting. Orders placed before 2 PM are processed the same day for lightning-fast UK delivery.
Eco-Conscious Packaging: We prioritise 100% recyclable materials, helping your small business stay green without the high price tag.
No-Hassle Returns: Not the right size? No problem. We offer a 30-day money-back guarantee for all unused packaging
Free shipping on all orders over £50

Guaranteed Safe Checkout

The All-in-One Shipping Solution for New Sellers

Stop worrying about which size bag to buy and start shipping with confidence. Our Mixed Grey Mailing Bags Starter Pack is designed specifically for Vinted, eBay, and Depop sellers who need flexibility without the commitment of buying hundreds of a single size.

This 30-bag bundle gives you the perfect variety of our three most popular sizes (A4, A3, and A2), ensuring you have the right fit for everything from a single T-shirt to a heavy winter puffer jacket.

What’s Included in Your Mixed Grey Mailing Bags Starter Pack?

Bag Size	Quantity	Ideal For
A4 (9″ x 12″)	10 Bags	Small apparel, t-shirts, and accessories.
A3 (12″ x 16″)	10 Bags	Jeans, hoodies, and standard shoe boxes.
A2 (16″ x 21″)	10 Bags	Bulky jackets, bedding, and multi-item bundles.

Why Choose Packaging365 Grey Mailers?

100% Opaque for Privacy: Our high-density grey film ensures your contents are completely hidden from prying eyes.
Professional & Secure: Featuring an extra-strong “peel and seal” adhesive strip. Once it’s closed, it stays closed.
Weatherproof & Tear-Resistant: Built to survive the UK postal system. Waterproof and durable enough to resist punctures during transit.
Eco-Conscious Choice: Made from 100% recyclable materials, helping you keep your “green” rating high with your customers.

Pro Tip: Save money on postage! Using the correct size bag doesn’t just look more professional; it prevents you from paying “Large Parcel” rates for items that should have been “Small Parcels.”

Additional information

Weight	0.43 kg
Colour	Grey
Pack Size (Bags)	30

Mailing Bags Size Guide

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 mm	T-Shirts, Leggings, Thin Summer Dresses, A4 Documents	Large Letter (if < 25 mm thick)
12 x 16″	300 x 400 mm	The “Workhorse”: Hoodies, Jeans, Coats, Small Shoe Boxes, Small Bundles	Small Parcel
16 x 21″	400 x 525 mm	Winter 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

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.
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!
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.

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Mixed Grey Mailing Bags Starter Pack – 30 Bags (A4, A3, A2 Mix)

The All-in-One Shipping Solution for New Sellers