Continue writing the next sentence.

How to set up a parrotlet cage
Give your bird room to stretch its wings.
Parrotlets will like some space, so a cage that's about 18 inches (46 cm) on each side and 20 inches (51 cm) high will work perfectly fine. You can choose a larger cage if you like, but there's no need for it to be huge.
Choose a cage with narrow bar spacing. Parrotlets can get caught between the bars of cages if they're not properly spaced.