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"with so many different sizes & styles of postal boxes for you to choose from, we are sure to have the solution for you. If you can't find what you are looking for, call us on 01707 635353 and we will be happy to help"

Postal Boxes - Single Wall Cartons

single wall box, boxes & single wall cartons

Our range of single wall postal boxes gives you a choice of 30 sizes, perfect for mailing many different items. Costing from less than 13p per box these cardboard boxes are economical while providing the strength and reliability you need. Supplied in flat packs of 25, they maintain their shape once assembled.

Since Royal Mail have made changes to their Small Parcel size restrictions, you can now send a small parcel up to 450 x 350 x 160mm.  Our new L96 carton (shown in the list below as internal dimensions) goes right up to this limit, so you can use our L96 as a small parcel, up to 2kgs.  For further details on Royal Mail's sizing and weight restrictions take a look at our Pricing in Proportion information page.

Alternatively, click here to view our full range of Small Parcel Packaging.

Single wall cartons are extremely versatile mailing boxes. You can place smaller ones inside larger ones for instant added protection, and/or use void fill materials to cushion items and hold them in position.

single wall box, boxes & single wall cartons

 Sizes below are given LENGTH x WIDTH x DEPTH, and are the internal measurements.

Code Size (mm) Size (ins)
L2 102 x 102 x 102mm 4 x 4 x 4ins
L4 130 x 130 x 130mm 5 x 5 x 5ins
L5 165 x 165 x 68mm 6.5 x 6.5 x 2.7ins
L6 155 x 130 x 95mm 6 x 5 x 3.75ins
L8 155 x 155 x 155mm 6 x 6 x 6ins
L10 180 x 180 x 180mm 7 x 7 x 7ins
L12 215 x 180 x 102mm 8.5 x 7 x 4ins
L13 220 x 165 x 165mm 8.75 x 6.5 x 6.5ins
L14 230 x 155 x 155mm 9 x 6 x 6ins
L16 230 x 230 x 130mm 9 x 9 x 5ins
L18 230 x 230 x 230mm 9 x 9 x 9ins
L19 254 x 155 x 133mm 10 x 6 x 5.25ins
L20 280 x 215 x 205mm 11 x 8.5 x 8ins
L22 300 x 210 x 155mm 11.75 x 8.25 x 6ins
L23 305 x 228 x 68mm 12 x 9 x 3ins
L24 280 x 280 x 280mm 11 x 11 x 11ins
L25 305 x 228 x 130mm 12 x 9 x 5ins
L26 305 x 228 x 228mm 12 x 9 x 9ins
L28 305 x 305 x 155mm 12 x 12 x 6ins
L30 305 x 305 x 254mm 12 x 12 x 10ins
L32 380 x 280 x 280mm 15 x 11 x 11ins
L34 380 x 330 x 305mm 15 x 13 x 12ins
L36 405 x 355 x 205mm 16 x 14 x 8ins
L38 405 x 405 x 405mm 16 x 16 x 16ins
L39 432 x 305 x 254mm 17 x 12 x 10ins
L96 439 x 339 x 143mm 17.25 x 13.25 x 5.75ins
L40 510 x 457 x 405mm 20 x 18 x 16ins
L42 510 x 305 x 305mm 20 x 12 x 12ins
L44 610 x 457 x 305mm 20 x 12 x 12ins
L-1 88 x 63 x 516mm 3.5 x 2.5 x 20.25ins

single wall box, boxes and single wall cartons

Our single wall postal boxes are robust and eco-friendly. Manufactured from 75% recycled material, they are totally recyclable or can be reused. The inner single flute cardboard gives them strength while the outer Kraft surface makes them a presentable shipping box.

Single wall cardboard boxes are widely used in many businesses as the all-round general purpose postal box, thanks to their affordability and reliability. Our superb range of single wall postal boxes runs from the small 102x102x102 mm carton (4x4x4 ins) to the large 610 x 457 x 305mm shipping box (24 x 18 x 12ins) and a vast number of sizes in between.

Secure your mailing boxes with one of our packaging tapes and either use an adhesive label or write on the surface with one of our marker pens. For extra protection you can seal the single wall postal box with a warning tape and/or stick on a fragile/handle with care label.


Telephone us on 01707 635353
Monday - Friday 9:00am to 5:00pm
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