Listings range from compact cages about 18 in L × 18 in W × 24 in H up to tall flight aviaries around 20.5 in W × 19.75 in D × 55 in H. Other common dimensions shown include roughly 37.6 in L × 18 in W × 41.5 in H and 18.11 in × 18.11 in × 38.19 in.

Capacity descriptions range from starter cages for 1–2 small birds up to divided breeder cages designed to house about 3–4 small birds.

Many cages include easy-clean features such as pull-out or slide-out bottom trays, removable shelves or panels, and detachable components that simplify daily cleanup and occasional deep cleaning.

Most cages list wooden dowel perches and feeder bowls or cups. Counts vary by model — examples in listings include two perches with two food containers, two feeders with three dowel perches, or packages listing four feeder cups and four perches.

Several breeder cages include a dividing grate or removable divider so you can create two separate compartments or remove the divider to use one larger space. Some designs also allow the upper cage section to be removed and used separately.