Strong Recycled Single Wall Cardboard Packing & Shipping Box – 13×8×2.5″ (330.2×203.2×63.5 mm, Royal Mail Small Parcel Compliant, Eco-Friendly Postal Box UK)
Strong Recycled Single Wall Cardboard Packing & Shipping Box – 13×8×2.5″ (330.2×203.2×63.5 mm, Royal Mail Small Parcel Compliant, Eco-Friendly Postal Box UK)
This 13×8×2.5″ cardboard box is one of the most reliable and widely used Royal Mail Small Parcel sizes in the UK. It offers a generous internal space while staying firmly within Royal Mail’s size limits, making it ideal for e-commerce sellers who need a secure, lightweight and cost-effective postal box. Made from strong recycled single wall board, it provides dependable protection for clothing, beauty items, accessories, gadgets, crafts and subscription-style products. The clean, professional appearance makes it suitable for retail brands, while the eco-friendly construction supports sustainable packaging choices. Delivered flat-packed, it stores neatly and assembles quickly during busy packing hours.
Designed for Royal Mail Small Parcel Rates
If you want to keep postage costs down without compromising protection, this box is built for you. It fits comfortably within Royal Mail’s Small Parcel dimensions, reducing the risk of oversize charges. Many online sellers choose this specific size because it combines a larger footprint with controlled depth, offering excellent packing flexibility for thousands of SKUs.
Who Uses This Size?
This 13×8×2.5″ box is popular with a wide range of businesses, including:
- Clothing brands shipping tops, T-shirts and folded garments
- Beauty, skincare and haircare companies
- Craft, handmade and Etsy sellers
- Tablet cases, phone accessories and small electronics
- Subscription and sample box services
- Stationery brands and gift businesses
Measurements & Size Guidance
Internal dimensions: 13×8×2.5″ (330.2×203.2×63.5 mm)
These measurements are internal, giving you accurate packing space before adding tissue, kraft paper or protective fill.
Recommended alternatives:
- Smaller: 8×6×2.5″ Royal Mail Box
- Similar footprint but deeper: 12×9×3″
Box Strength & Weight Capacity
Manufactured from high-quality recycled B-Flute board, this box delivers strong resistance to crushing and edge pressure. When packed correctly, it is commonly used for items weighing between 3–4 kg. For fragile goods, add padding for extra security.
How to Pack This Box Effectively
- Place items centrally to prevent corner pressure
- Add kraft paper, bubble or tissue where appropriate
- Use a good quality packing tape for a firm seal
- Use an H-pattern seal for heavier contents
Sustainability & Environmental Benefits
This box is made from 100% recycled cardboard and is fully recyclable, biodegradable and compostable. No plastic, no coatings — just simple, clean, eco-friendly packaging that meets UK recycling standards.
Multi-Buy Pricing (inc VAT)
| Pack Size | Total Price | Per Box |
|---|---|---|
| 25 Boxes | £14.99 | £0.60 |
| 50 Boxes | £27.99 | £0.56 |
| 75 Boxes | £38.99 | £0.52 |
| 100 Boxes | £49.99 | £0.50 |
| 200 Boxes | £94.99 | £0.47 |
Bulk and pallet quantities available – contact us for trade pricing.
Courier & Postal Guidance
This box works with Royal Mail, Evri, DPD, Yodel, UPS and DHL. Always check your final packed item for correct weight and size before selecting a service.
Courier size guides:
- Royal Mail – Size & Weight Guide
- Evri – Parcel Size Guide
- Yodel – Size Guide
- DHL – Size Guide
- UPS – Dimensions & Weight
- DPD – UK Parcel Guidance
Delivery & Despatch
- Same-day despatch before 5 pm (Mon–Fri)
- Royal Mail Tracked for smaller orders
- DPD Next Day available
- DPD Saturday delivery available
Recommended Packaging Supplies
Customer Support
Need help choosing the right size? Our team is here to help.
- WhatsApp: +44 7450 981838
- info@mrbags.co.uk
- Click & Collect: 10A Locket Street, Manchester, M8 8EE
- Opening hours: Mon–Fri 10:00–19:00 | Sun 11:00–18:00
| Material | 100% Recycled Corrugated Cardboard |
| Size | 13×8×2.5 Inch |
| Color | Brown Kraft |
| Assembly | Supplies flat-packed (Sealed with Packing Tape) |
| Eco-Friendly | Fully Recyclable Biodegradable and Compostable |
| Flute Type | Single Wall B Flute |
| Postal Format | Royal Mail Small Parcel Compatible |
| Recommended Storage | Store in a dry environment at 13–21°C for best performance |
| Weight Capacity | Typically up to 3-4 kg when packed correctly |
What can I pack in a 13x8x2.5 inch Royal Mail Small Parcel box?
This size is ideal for clothing, accessories, beauty items, phone accessories, books, stationery, craft products and subscription kit items that need a secure flat box.
Is this 13x8x2.5 inch box Royal Mail Small Parcel compliant?
Yes. This box is designed to fit comfortably within Royal Mail’s Small Parcel dimensions when packed correctly, helping you keep postage costs low.
Are the 13x8x2.5 measurements internal?
Yes. All sizes are internal to reflect the actual usable space inside the box for your products and packing material.
How much weight can this box hold?
When packed with suitable padding and sealed well, this box is commonly used for items up to 3–4 kg. Always check your chosen courier’s weight limits.
Is this box eco-friendly?
Yes. It is made from 100% recycled cardboard and is fully recyclable, biodegradable and compostable through normal UK cardboard recycling streams.
Does the box arrive flat-packed?
Yes. The boxes are supplied flat-packed for easy storage and quick assembly.
Is this size suitable for other couriers besides Royal Mail?
Yes. It works well with all major UK couriers, including Evri, DPD, Yodel, UPS and DHL. Always check your final packed dimensions.
What tape should I use to seal this box?
Standard clear or brown packing tape works well. For heavier contents, seal the base using an H-pattern for added strength.
Can I order bulk quantities?
Yes. Multi-buy options and pallet quantities are available for regular e-commerce and wholesale customers.
Can I request a sample before buying?
Yes. Samples are available on request so you can confirm the size and fit.
Royal Mail 24 Tracked
Dispatched same day if ordered before 5 pm Monday to Friday. Please allow up to 1-2 days for delivery.
£1.99
DPD Next Day
Dispatched same day if ordered before 3 pm Monday to Thursday. Not available to Scottish Highlands & Islands.
£4.99
Free on orders over £100