How to understand bin sack measurements

At some point, you’ve seen this... 18 x 29 x 39" ...and wondered how this tells you what sack you're looking at.

That is sack dimensions. 18 x 29 x 39" refers to the most common sack dimensions for your general and recycling waste bins at most commercial cleaning contracts.

Throughout the cleaning industry, cleaning companies have multiple uses for bin sacks and come across different bin sizes every day. Having the dimensions easily accessible, makes it easier for their purchasing teams to know which sacks they need to order for each contract or specific need.

The first thing to make clear is it isn’t actually Length x Width x Height, like most dimensions.

It’s Folded width x Open width x Depth - measured in inches. See the image below for a pictorial description.

Folded Width

The folded width is the measurement of the width of the sack while it's still folded. It doesn't necessarily have any correlation with the bin size.

Open width

The Open, or opened, width is half the circumference/perimeter of the top of the bin.

To measure this;

     1)  Wrap a tape measure around the outside of the bin. Make sure it's the outside of the bin, at its widest point, so that the sack will be able to fit over the top rim.
     2)  Once you have your circumference/perimeter measurement, you half that number, to get the Open Width
     3)  Add another 10-30cm to ensure the sack isn't weakened when you put it into the bin and doesn't break as the weight of the waste stretches the bag further.

Depth

To get the depth of the sack you need, measure the depth of the bin and add enough to the measurement to create a generous lip. This is for two main reasons;
     -   So that the sack fits over the edge of the bin
     -   So that as the bin is being filled, the sack doesn't fall in


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