Self-locking Carton 305 x 213 x 78mm

Self-Locking White Boxes Self-locking Carton 305 x 213 x 78mm

White PIP Box A5

Small White PIP Postal Box | Large Letter Postal Box | 222 x 160 x 20mm

Self-Locking White Small Parcel Boxes | Small PIzza Box | 305 x 305 x 52mm

Made in the UKRecyclableRecycledHome CompostableBiodegradeableFrom Sustainable Sources

Eco-friendly, recyclable Self-Locking White Boxes

Box Dimensions: Square 305 x 305 x 52mm (internal measurements)

This box will fit through Royal Mails "Small Parcel" Slot. Ideal box for A4 sized objects that are approx 50mm deep like books, cables, components and a small pizza!

Seal with Transpack's eco-friendly printed paper packaging tape for a great look and all round eco-friendly parcel.

Use Grease Proof Paper to stop oil from baked goods seeping into the box-base, and drying out

Sold in packs of 25Contact us for special discounted prices on bulk pallet orders of 1000 boxes or more


From: £22.2500 for 25
Availability: In stock
Product Code

£26.70 inc VAT

Price for minimum quantity of 25 is £22.25

Available to buy in increments of 25

  • Buy 50+ for £33.50 ( £0.6700 each) and save 25%
  • Buy 200+ for £110.00 ( £0.5500 each) and save 38%

Transpack stocks a good range of self-locking boxes for product packaging and posting or shipping items out. They are sturdy and strong and ideal as e-commerce boxes. Our postal boxes are your answer to sustainable eco-friendly packaging for your business.

  • A range of eco-friendly, biodegradable tough white postal boxes made of durable corrugated board made form sustainable recycled materials
  • Postal boxes provide an excellent protection and presentation for your products without the need for additional packaging accessories like labels
  • These boxes have a mottled white outer (or they come in brown) - view our website for options. The inks are water based and eco-friendly 
  • A 305x305x52mm box is a suitable size to take A4 sheets, pads of paper, brochures, catalogues, samples, electrical wiring and electrical products that are shallow in depth
  • This box will fit pizzas and focaccia breads measuring up to 11" and 12" / 303x303mm
  • Our self-lock cartons are made from sustainable, recycled material, and fully recyclable and compostable
  • From time to time the inner lining of the box can appear 'cracked' at the crease on the inside of the box. This happens during production and is caused by pressure in the die cutting process if the paper is particularly dry. It has no effect on the strength of the box at all and is invisible when the box is made up. The box is still fully functional. If you receive any boxes like this you are welcome to send them back to us at your cost for a refund.
More Information
Colour/Finish White
Made in the UK Yes
Recylable? Yes
Made from Recycled Material? Yes
Home Compostable? Yes
Biodegradable? Yes
FSC approved Yes
Free Delivery No
Length 305mm
Width 305mm
Height 52mm

What are the benefits of using Transpack's Self Locking Postal Boxes?

  • Our boxes are made from 100% Recycled material
  • These boxes are recyclable, biodegradable and compostable
  • Pizza boxes that fits a pizza up to 303 x 303mm
  • Square shaped box with good versatile depth
  • White outer for easy labelling - just write on the box with a Sharpie

Postal boxes are collected by the vast majority, if not all, of Local Authorities in household recycling collections, but can also be taken to local recycling centres.

If you have a home composter you can also compost them. It works best if they are shredded first or torn into smaller pieces as they will decompose more quickly.

Can I put these boxes into my compost heap at home?

Yes you can. Tear them into strips first for quicker decomposition

Are self-locking boxes recyclable?

Yes they are

Do these self-locking boxes come in brown?

Yes they do come in brown.

How do I protect my product inside a self-locking box?

Wrap your product in our acid free Transpack Tissue Paper. You can also add some of our shredded paper to the base and sides to stop the product shifting in the box during delivery. 

A good box for a medium sized pizza?

Try a 11" or 12" square box for you pizzas and giant cookies. These boxes measure 305x305x52mm. The ends do not go inside the box, making it wasier to close when pizza is inside.