Capacity
The main way to distinguish between front-loading washing machines is on their capacity. This generally ranges from 5-16kg. While a 5kg machine is usually adequate for singles and couples, large families should look for a capacity of 7.5kg or more.
The capacity of the drum in your washing machine is measured in kilograms, so weigh a full basket of dirty laundry to get a better idea of your average wash size. If you'd prefer to do fewer loads during the week, choose a model with a larger capacity.