Bird Cage Buying Guide: Size, Spacing, Material, Doors, Tray and Price, in Order

1. The species minimum, from the tables

Merck's table gives a minimum cage and a bar spacing per bird; VCA's housing pages give a second set in feet; where they differ, use the stricter. Both are floors for one bird, and both sources say bigger is better and that the cage should be wider than it is tall for most parrots. The size guide has every row; the short version:

Bird	Merck minimum (W x D x H in)	VCA minimum (ft)	Merck bar spacing
Finch, canary	12 x 12 x 24 (VCA/PetMD figure)	1 x 1 x 2	1/4 to 3/8 (retail charts; VCA: small enough that the head cannot pass)
Budgie, lovebird, parrotlet, cockatiel	20 x 20 x 30	1 x 1 x 2 (budgie); 2 x 2 x 3 (cockatiel, lovebird, parrotlet)	1/2
Conure, caique, Senegal	36 x 24 x 48	3 x 3 x 3	3/4
African grey, Amazon, small cockatoo	40 x 30 x 60	3 x 3 x 4 (grey, Amazon); 2 x 3 x 4 (small cockatoo)	1
Large cockatoo	40 x 30 x 60	4 x 4 x 4	1
Macaw	48 x 36 x 66	3 x 3 x 4 (small); 4 x 5 x 5 (large)	1 1/2

Measure against the interior, not the box. Prevue publishes both (its 3152 is 23 1/4 by 19 3/4 inside and 26 by 22 overall, with the stand adding height); most listings publish the overall size including the stand and seed guard, which can be ten inches taller and four inches wider than the space the bird gets. If a listing gives one number, assume it is the biggest one.

2. Bar spacing and gauge

Spacing from the table above, measured with a ruler when the cage arrives, because listings print 0.4, 0.5, 5/8 and 10 mm for cages that measure otherwise. Gauge is the bar's thickness, and the Merck table pairs wide spacing with birds that bend thin wire: Prevue states 8 or 9 gauge on its macaw and grey cages and 12 to 16 on its budgie cages, and most other makers state nothing, which is a reason to prefer the one that does. Converging bars, domed tops and scrollwork trap heads and toes (PetMD). The bar spacing guide has the species table and the retail chart beside it.

3. Material

VCA: all-metal, never wood or wicker for a parrot; painted cages chip and some older coatings contain zinc; electroplated is the safer painted option; uncoated stainless is preferred. Howard's 1992 JAVMA study: galvanized coating is toxic to cockatiels; brush and inspect any galvanized cage before use. Prevue states its coatings are zinc-free; few others state anything. The materials comparison prices the stainless premium; for most birds a stated zinc-free powder coat is the buy, and for a bar-chewing grey, cockatoo or macaw stainless is.

4. Shape

Rectangular, wider than tall (VCA; Merck; PetMD). Round cages give no corner and little length. A playtop is a stand the bird uses when the door is open, not cage space; a dometop adds height a bird rarely uses. Corner cages give a shy bird two walls. Length is the dimension that lets a bird fly, and it is the one most cages are shortest on.

5. Doors and locks

A door big enough to lift a bird out on your hand without folding it; feeder doors so dishes change without opening the main door; latches a beak cannot work, and locks on a large parrot's cage (Prevue fits two styles on the Imperial). A parrot that lets itself out meets every hazard on the safety checklist.

6. Grille and tray

A removable grille that keeps the bird off the droppings and a tray that pulls out with the cage closed, so the daily paper change (VCA) happens without the bird out. A seed guard around the base is a floor item. Half-width trays and grilles (Prevue's Imperial) come out through a door that does not need the room cleared.

7. Stand

Casters, so the cage moves to the family by day and the dark by night (the placement guide); a shelf; a height that puts the top perch about at your eye level (PetMD's chest height). A cage sold without a stand is a cage on a table, which is where a cat sits.

8. What listings hide

Listing says	Check
"For parakeets to macaws"	No cage is; find the spacing and size and match one bird
One dimension set	Overall with stand; ask for interior
"Non-toxic coating"	Ask for the zinc-free statement in writing; Prevue publishes one
"Wrought iron"	Means coated steel; the coating is the question
"Stainless steel"	Ask the grade (304 is the food grade); magnets are a rough screen only
"Outdoor aviary"	Read the care note; some say keep out of rain
"0.4 inch" or "5/8 inch"	Measure on arrival; return if it is not what the bird needs
Star ratings	Not a measurement of anything on this page

9. Price by size class, October 2026

Class	Example	Interior or overall (in)	Spacing	Price
Finch or budgie starter	Prevue Parakeet Manor; Prevue SPF0610	12 x 9 x 16; 30 x 18 x 18	3/8	$27 to $80
Budgie or cockatiel flight	Prevue F040; Yaheetech 52	30 1/4 x 20 1/4 x 40 interior; 31 x 20.5 x 37	1/2; 5/8	$72 to $190
Conure	Prevue F050; Yaheetech 60 flight	36 1/8 x 22 1/8 x 47 interior; 37 x 22.5 x 44.5	1/2; 5/8	$186 to $300
Grey or Amazon	Prevue 3154; Mcage XXL; Flyline corner XL	34 1/2 x 22 3/4 x 36 1/2 interior; 36 x 28 x 52 interior; 51 x 51 x 73 overall	3/4 to 1	$390 to $760
Macaw	Prevue Empire 3157; Seny double	45 3/8 x 35 3/8 x 63 interior; 64 x 32 x 73 overall	1 to 1 3/8	$830 and up (Empire at retailers)
Stainless	Prevue Imperial 3457	39 1/4 x 25 7/8 x 60 interior	1	About $1,000
Walk-in aviary	A&E WI8662	86 x 62 x 79 overall	1	$2,738

Prices are what the listings and makers showed on October 9, 2026; every example is in a species guide with its shortfalls against the table stated. The pattern across the market is that price buys length and gauge, and that the cages sold for a species at the low end of its price class are under its Merck row; the cockatiel, conure and macaw guides say which.

10. The order, again

Species row first. Spacing and gauge second. Material third. Then shape, doors, tray, stand. Then the listing's traps. Then price. A cage that passes the first three and costs more than the one that fails them is the cheaper cage, because it is bought once.