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bin bag size guide — width and length formula diagram

A practical guide to choosing the right size bag for your bin

Selecting the appropriate trash bag size for your bin might seem straightforward, but it’s such a hassle when you get it wrong! To save you from unnecessary bother and mess, here are some tips to help you determine the right size bag for your bin.

Measure your bin – first step to finding the right size bag for your bin

Before shopping for bin liners, get to know the dimensions of your bin.

  • Round bins: measure the height and diameter.

  • Rectangular bins: measure length, width, and depth.

These simple measurements help you quickly find the correct bin liner size. In addition, they make choosing your next pack of bags far easier.

Check bag dimensions when you shop – right size bag for your bin guide

Most trash bag manufacturers list the dimensions of their bags on the packaging. You’ll find both the capacity (in litres) and the dimensions (in centimetres) on the sleeve or box all Ecopack bin liners.

The bag and bin dimensions don’t need to match perfectly. However, choose a bag that’s as close as possible for a good fit.

Calculate the liner size you’ll need – to choose the right size bag for your bin

  1. Add up the measurements of all sides of the bin.

  2. For a circular bin, measure the circumference (or diameter × 3.14) and divide by two — that number is the open width of the bin.

  3. Measure the height of the bin.

  4. Add around 20% to the height to allow for an overhang and easy tying.

This calculation shows the liner size (width × height). Using this method ensures you always choose the right size bag for your bin.

Consider bag capacity:

Manufacturers often categorise rubbish bags by litre capacity, which shows how much volume they can hold. Check your bin's capacity and pick a slightly larger bag. A larger bag makes removal easier and prevents spills.

Do you need a heavy-duty bag?

Think about the type of trash you typically dispose of. If you often throw away bulky or sharp items, you might need a more durable bag that can handle heavier loads without tearing.

Ecopack recycled plastic bags come in:

  • All Purpose (AP) – suitable for home and office waste

  • Medium Duty (MD) – stronger for mixed waste

  • Heavy Duty (HD) – ideal for commercial or heavy loads

Consider the type of waste – compostable or recycled liner?

If you’re disposing of food scraps, green waste and/or organic matter, then choose an Ecopack Compostable Bin Liner. That way the whole lot can be composted instead of clogging up landfill.

Size up for practicality – ensure the right fit for your bin

A bag that fits snugly around the rim of the bin is easier to use and less likely to slip down or get caught when removing the trash.

Choose a bag that’s slightly larger than your bin to make sure it captures all waste without spilling.

Know what’s green and what’s not – sustainable bag choices

Be aware that, while many bags in Australia are called “biodegradable,” that doesn’t mean they’re compostable.

These are often petroleum-based plastics with chemical additives like EPI or D2W, which only break down into microplastics. They’re not good for the environment.

Choose a sustainable solution – eco-conscious bin bag options

If environmental impact is a concern, look for bags made from post-consumer recycled plastic or those that are certified home compostable.

When you buy Ecopack bin liners, you can rest assured that the supply chain is audited and you’re buying a truly eco-conscious product.

Get value for your money:

Buying bags in bulk or choosing larger sizes that fit multiple bins in your home can be more cost-effective in the long run.

Experiment with different bag materials:

Compostable bin bags feel different from other bags. Recycled ocean-plastic bin bags don’t have a shelf life and can be stored indefinitely. Each bin liner range has its own pros and cons, so try a few to see what works best for your home, office, or workplace.

Final thoughts – choosing the right size bag for your bin

Choosing the right size bag for your bin is a balance of practicality, cost-effectiveness, and sustainability. By considering your bin’s dimensions, capacity, and waste type, you can make a confident choice.

A well-fitted bag prevents spills and mess and makes taking out the trash much easier. Happy bagging!

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