Don’t underpay for your Royal Mail Medium Parcel delivery.

We love custom made boxes, but when you’re sending via Royal Mail, you want to be sure the box is the right size. That’s why we’ve limited the sizes on this page to fit within the 610mm x 460mm x 460mm restrictions. So, you can send your handmade bird houses, your latest art print, or your Koban ceramic vase without worrying about underpaying. Just make sure your package weighs under 20kg and you’ll be good to ship.

Can your product fit in a smaller box? Check our small postage boxes for Royal Mail. You could save money on postage and packaging.

Great for:

  • Larger tech (like laptops and computer cases)
  • Home decor
  • Handbags
  • Tools (like drill and jigsaws)

Our Royal Mail Medium parcel boxes are a great all-rounder. By choosing a double-wall, our B flutes can hold up to 20kg (the maximum weight for Royal Mail!). Our 125 graded corrugated cardboard,  supported with our cardboard pads, keeps it’s shape and structure throughout the network. Your customers receive their order in one piece – no matter how turbulent the journey is.

Don’t underpay.

Use our tool to create your box and place an order today.

Comes in packs of 25. No minimum order.

Size: (L) x (W) x (H) mm
Strength: Please select strength
Quality: Please select strength
Quantity: 1 x 25 ( 25boxes )
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    Select Dimensions (in mm)

    Min 100 - Max 1200

    Min 100 - Max 950

    Min 100 - Max 1000




Additional Product

What's the current parcel size restrictions for Royal Mail?

These sizes are correct of July 2022. Please refer to Royal Mail’s official size and weight guideline for the most recent restrictions.

Medium Parcel

Max weight – 20kg

Max length – 610mm

Max width – 460mm

Max height – 460mm

Small Parcel

Max weight – 2kg

Max length –  45cm

Max width – 35cm

Max height – 16cm

If your product fits in a small parcel, save money on postage and boxes by ordering our small delivery boxes for Royal Mail.