Sizes and weights

Understand how to choose the right size for your parcel, and how the shipping cost is calculated. Below is all of the information you need to master the booking process.

Size Options

Sendle has 1 satchel size, and 4 box or satchel sizes available. Each size has both a weight and cubic volume limit. You must choose a size that fits both the weight and volume under the limit.

  • Satchel - up to 500g and 2L (more information here)
  • Shoebox - up to 2kg and 8L
  • Briefcase - up to 5kg and 20L
  • Carry-on - up to 10kg and 40L
  • Check-in - up to 25kg and 100L

If you are a business and looking for 1kg and 3kg rates, we've got an exciting hack for you. For more information, get in touch with our business team here

If you’re unsure what size your parcel is, use the dimensions calculator (example below).

Sendle Parcel Size Calculator


  • The longest side of any parcel cannot be bigger than 1.2m (120cm).
  • The largest volume for any parcel is 100L.
  • The heaviest weight for any parcel is 25kg.

Can I just use the weight or the volume?

 - No. You must choose the size that fits BOTH the weight and volume under the limit.


Both of these fit under the weight and volume limit for a 5kg and 20L Briefcase size parcel:

  • 10cm x 40cm x 50cm (20L) + 1kg.
  • 1cm x 40cm x 50cm (2L) + 5kg.

Neither of these parcels fit into the 5kg and 20L Briefcase size parcel. Either the weight or the volume exceeds the Briefcase limits:

  • 10cm x 40cm x 50cm (20L) + 9kg = Carry-on.
  • 100cm x 15cm x 20cm (30L) + 1kg = Carry-on.

Volume is calculated as a cube (like a box) in litres. Litres are calculated by multiplying the centimetre of the three dimensions in centimetres and dividing by one thousand (height X width X depth [all in cm] ➗ 1000).

Now that you know how to figure out the size you can create an order for your parcel using our national flat rates and save a bunch on your delivery costs.



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