The first question you should ask yourself when buying a rubbish bin, is how big must it be. Do you have a large family or do you live on your own? That will make a huge difference in the amount of waste your household produces, and the garbage bin you need. You might be thinking: the bigger, the better. But if it's just the two of you, a huge bin won't be such a good idea. If the bag isn't replaced regularly because it isn't full yet, you will soon be faced with bad smells. And a family with four children will soon regret buying a rubbish bin with just a 30 liter volume. So choose a model that suits your household
How many house mates?
You can assume that a waste bin from 10 to 30 liters will suffice for a small family (up to three persons). Those with four in the household, should rather go for a waste bin between 30 to 40 liters and for families with five or more persons, a 40 to 60 liter bin will be ideal.
By the way, this advice on the ideal volume is of course applicable to the rubbish bin in your kitchen. A more compact model is more convenient in the bathroom or in the toilet. A model of up to 10 liters is advisable there. For your study or bedroom, you won't need a bigger content than 30 liters.