This section includes all the nappy systems where 2 or more sizes are required. It also includes Teeny, Tiny and XL nappies although they also have their own dedicated areas of the site.
Newborn nappies are designed for the first few weeks of your baby's life. Generally, Size 1 nappies fit from 7lbs to about 20 lbs. Some nappies here also fit from birth to about 17lbs and are slimmer fitting than traditional size 1 nappies so are a good alternative.
Size 2 nappies are designed to fit from 20 lbs to 35lbs but usually can be worn by babies below this weight range, say 14-16lbs upwards. The third size (where available) may not be required as it is for older/bigger toddlers of 35+lbs.
See the "Cloth Nappies Made Simple" page for the pros and cons of using Sized vs Birth to Todder nappies.