It is always best to purchase the largest habitat possible for these active little birds, but the minimum requirement for a single lovebird is 18”W x 18”D x24”H with bars spaced no greater than ⅜ inches apart. Flight cages are another great option for lovebirds. A properly sized habitat should be large enough that the bird can spread its wings without touching the bars or accessories while still having plenty of room for playing, exercise, multiple perches and toys.