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Sendle parcel sizes and weights

Choosing the right size option for your parcel will ensure there are no hiccups along the way. And we can show you how!

This article has all the information you need to master the Sendle booking process, how to choose the right size for your parcel, and how the shipping cost is calculated.

If you want to know what sort of things fit into each parcel size and the most common box sizes for each, check out our Package Size Guide!

Size calculation

Sendle has five general parcel sizes to slot your shipment into. Think of each as a size ceiling that your parcel must fit under to qualify. Using weight and volume, you can easily find the parcel size that’s right for your shipment.

You need to choose a size that is under both the weight and volume limit (unless you are using the first two sizes). Here are the current Sendle size options:

  • Micro (<0.5 lb)
  • Mini (<1 lb)
  • Small (<5 lb and <173 in³)
  • Medium (<10 lb and <518 in³)
  • Large (<20 lb and <864 in³)


If you are more the table type, here is a simple breakdown of our package sizes:

  Weight Volume
Micro <0.5 lb Unlimited*
Mini <1 lb Unlimited*
Small <5 lb Up to 173 in³
Medium <10 lb Up to 518 in³
Large <20 lb Up to 864 in³

*not to exceed a combined length and circumference of 108"

Maximum sizes

  • The maximum combined length and circumference of any parcel is 108”
  • The largest standard-sized parcel is 20 lb and up to 864 in³


Both of these fit under the weight and volume limit for a 20 lb and 864 in³ large box size parcel:

  • 12” x 12” x 6” (864 in³) + 18 lb
  • 10” x 6” x 2” (116 in³) + 11 lb

Neither of the following parcels fit into the 20 lb and 864 in³ size parcel. Either the weight or the volume exceeds the parcel limits:

  • 10” x 10” x 8” (810 in³) + 25 lb = too heavy
  • 14” x 14” x 10” (1964 in³) + 5 lb = too large

How to manually calculate cubic volume: 

Volume is calculated as a cube (like a box). We represent this volume in cubic inches, so it's super easy to figure out. Find your volume in cubic inches by just multiplying your box length by width by height in inches. Voila! Volume!

How to simply calculate your parcel volume:

Right in your 'Sending' dashboard, you'll see our sizing tool. Simply enter your box dimensions and weight to automatically get your correct parcel size. It'll even select it for you.



Mailing tubes/cylinder-shaped parcels

Mailing tubes, or any parcel that is cylinder-shaped, are charged on the same basis as all Sendle parcels—that is, we need to consider both the weight (in pounds) and the volume (in cubic inches). 

  • To find the volume of a cylinder is a bit more complicated than your standard box. In equation form that looks like V=𝝅r2h. If that’s your thing, have at it.
  • To make your life easier, use this handy calculator to find your cubic volume. In the calculator, you can simply enter your radius (half your diameter) and the cylinder height to get your cubic inch volume. Much nicer than whatever math lecture we would have put you through.
  • Now, you've got your cylindrical volume in cubic inches. Great job!

Here’s an example: A tube that is 40 inches long and a radius of 5 inches would come to approximately 3,142 cubic inches, a volume far larger than our standard sizes allow. 

Parcel restrictions

  • In addition to the cubic volume, weight must also be considered when selecting the right parcel size. For example, if the tube has a volume of under 500 cubic inches and weighs under 10 lb, it must be booked as a Medium Box size (<10 lb and <518 in³).
  • All standard-sized parcels sent with Sendle need to be under 864 cubic inches, under 20 lb, and with a combined length and circumference of 108” or less in order to be fit for Sendle.
  • Also, take note of how your label fits on the tube. It’s very important that the parcel can scan correctly. Otherwise, the carrier may reject it at pickup.

Want to get started? You might like these:

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