Sizing and Identification of Rubber bands

General Rubber bands tend to be sold by weight with the exception of bands like “Mover & Pallet bands”, ”Slip on Grip” and certain other specialist rubber bands.
They are also sold by size. Because the bands are dispatched from the USA, the Imperial measurement system is used and therefore the weight would be expressed in pounds (lbs) and the size would be expressed in Inches (“).

Most of you will very quickly asking the question “How many bands are there in a pound”. The answer cannot be given as an exact figure because of the manufacturing process and the amount of moisture in the bands at the time of packing. Alliance Rubber supply a figure called the “Count per pound” (CPP) for each size of band. This is the minimum number of bands that you will receive per pound. You may receive more bands per pound than the quoted CPP and this can sometimes be as much as 5-10% more, but it will never be less. If you are buying small retail packs of certain bands, then you may be buying an actual number of bands.

To calculate the correct size of a band please calculate the following three measurements: –

  • Cut Width
  • Flat Length (Not stretched)
  • Wall Thickness

The following images will help explain what is meant by each term.


Standard rubber bands are sometimes referred to by a number. So if you know either the band number (often written with a # symbol – e.g. #33) or the above three measurements, then you are good to go for ordering.

If in doubt give AMJ Limited a call on +44 7779 245754 or send an email

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The following table shows the more common sizes and their corresponding numbers:


Rubber Bands Size Chart Numbers