Compostable Bin Liner Size Guide for Australian Homes and Businesses

The best compostable bin liner is the smallest bag that fits securely over the rim, reaches the base without excessive stretching and has enough capacity for the expected waste. Check the bag dimensions as well as the litre rating before ordering.

Choosing a bin liner sounds simple until the bag slips into the bin, stretches across the opening, tears during removal or leaves a large amount of unused material hanging over the sides. The litre number is useful, but it is only the starting point.

Bins with the same advertised capacity can have different shapes. A tall narrow bin, a wide office bin and a round hospitality bin may all require different bag widths even when their volume is similar. The most reliable approach is to compare the bin with the published bag dimensions.

Measure the bin before choosing a liner

Measure the bin at its widest points and allow enough material to fold over the rim. Then measure from the rim to the base and add extra length for the overhang and for tying or closing the bag.

•   Width across the top of the bin, including any wider lip or frame.

•   Depth from front to back for rectangular or square bins.

•   Height from the base to the rim.

•   Extra length needed to fold over the rim and close the bag.

•   Typical waste weight, including whether the contents are dry, wet, sharp or bulky.

If the bin is tapered, has an internal frame or uses a swing lid, test how the liner sits when the lid is fitted. A bag that technically holds the right volume may still interfere with the lid or pull away from the rim.

A practical guide to Bonnie Bio bag sizes

2 to 2.5 litre bags

The smallest Bonnie Bio bags are suited to compact tasks, including handheld dog waste dispensers and small multipurpose applications. Their compact roll format makes them easy to store in a pocket, car, cupboard or walking bag.

30 litre bin liners

A 30L liner is a practical choice for kitchen tidy bins, office bins, food-waste caddies and smaller workplace bins. Bonnie Bio 30L bags are supplied in perforated rolls of 15 and measure 250mm plus 150mm on each side by 570mm, with a 22-micron thickness.

Before using any liner for a council food-organics service, confirm the exact certification and liner type accepted by the local council. A product being home compostable does not automatically make it acceptable in every FOGO collection.

60 litre rubbish bags

The 60L size suits larger kitchen bins, tall bins, offices, staffrooms and general workplace waste. It provides more capacity than a kitchen tidy liner without moving into the larger wheelie-bin formats.

80 litre garbage bags

Bonnie Bio 80L bags are intended for larger rubbish bins and selected wheelie bins in homes, offices, schools, hospitality venues and commercial sites. Each roll contains 10 perforated bags. The bags measure 480mm plus 185mm on each side by 1,045mm and are 23 microns thick.

120 to 140 litre wheelie bin bags

This size is designed for larger commercial bins and common wheelie-bin applications. It can help contain waste and keep the inside of the bin cleaner, provided the bag dimensions suit the specific bin and the liner is not overloaded.

240 litre garbage and wheelie bin bags

The 240L format is the largest Bonnie Bio option and is intended for high-capacity bins used in commercial, institutional and facility-management environments. Large bags should be matched carefully to the bin and expected load because excess weight can make any liner difficult to remove safely.

Avoid double bagging by matching the bag to the job

A liner that tears or slips may lead people to use two bags for one bin. That increases consumption and undermines the purpose of choosing a better disposable product. Correct sizing, sensible fill levels and appropriate waste segregation usually matter more than simply choosing the largest or thickest option.

•   Keep liquids and unexpectedly heavy waste out of general bins where possible.

•   Do not force rigid, sharp or protruding objects into a soft liner.

•   Empty the bin before the bag becomes difficult to lift or close.

•   Use a liner designed for the bin rather than stretching a smaller bag across the opening.

•   Choose bulk cartons only when the stock can be used within its recommended shelf life.

Store compostable bags correctly

Compostable bags are designed to respond to conditions such as moisture, heat and microbial activity. That is useful at the correct end of life, but it also means storage matters.

Keep unopened rolls in a cool, dry place away from direct sunlight, excessive heat and moisture. Bonnie Bio rubbish bags generally have a natural shelf life of approximately nine months when stored correctly. Order quantities that match normal usage rather than holding more stock than the site can reasonably use.

Check the disposal pathway before filling the bag

The contents determine whether a used bag is suitable for composting. A compostable liner filled with conventional plastic, chemicals, hazardous waste or other unsuitable material should not be placed into home compost.

Council FOGO rules vary across Australia. Some services accept specific AS 4736 certified kitchen-caddy liners, some require council-supplied liners and others restrict compostable products. Always check the current rules for the local collection service.

Choose the size that fits the bin and the routine

The right liner should be easy to install, remain secure during use and close without excessive stretching. Measure first, consider the waste type and purchase a quantity that suits normal turnover.

Explore Bonnie Bio compostable rubbish bags and bin liners from 2L to 240L to find an option for household, office, hospitality and commercial waste collection.

Frequently asked questions

How do I know what size bin liner I need?

Measure the width, depth and height of the bin, allow extra material for the rim and closure, and compare those measurements with the bag dimensions. Do not rely on litre capacity alone.

Can I use a larger compostable bag in a smaller bin?

It may fit, but excessive material can bunch around the lid, waste product and make removal awkward. The smallest bag that fits securely and closes properly is usually the better choice.

How should compostable bin liners be stored?

Keep them in a cool, dry place away from direct sunlight, heat and moisture. Buy quantities that can be used within the shelf life shown on the product page or packaging.