Size reference
Standard crib dimensions.
Standard full-size crib: interior (mattress) 28 × 52 in (71 × 132 cm); exterior ~30 × 54 in (76 × 137 cm); assembled height ~35–45 in. CPSC minimum mattress spec is 27¼ × 51⅝ in. Convertible cribs can run larger.
Run a check
Will it fit?
On moving day
Moving tips.
- 01Keep the crib hardware in a labeled bag taped to one rail — crib bolts are model-specific and not interchangeable.
- 02Most cribs move most easily disassembled to the flat-pack panels; assembled, mind the ~30 × 54 in footprint at turns.
- 03Re-check every bolt for tightness after reassembly before the crib goes back into use.
Measure smart
What to measure.
Four numbers decide nearly every fit check. Get these right and the rest follows.
- 01The item's width, height, and depth at its widest points, including handles, feet, and any fixed trim.
- 02The smallest face of the item and its diagonal, which decide whether tilting it lets a long piece clear a tight opening.
- 03Every opening on the route: the door width, the hallway and any turn, the stair width, and the elevator door, not just the room you want it in.
- 04The weight, especially for appliances and solid-wood pieces, so you know how many people and what equipment the move needs.
Don't make these
Common mistakes.
Most “it didn't fit” stories trace back to one of these oversights.
- ⚠Measuring the room but forgetting the doorway, hallway turn, or stair landing the item has to pass through first.
- ⚠Ignoring the diagonal. Many pieces only clear a narrow door when tilted, which needs the diagonal, not the flat width.
- ⚠Leaving legs, doors, drawers, or cushions on. Removing them often saves the few inches that decide the fit.
- ⚠Assuming a published size matches your exact model. Compact, oversized, and apartment versions vary by several inches.
Frequently asked
Questions we keep getting.
What are the dimensions of a standard crib?
A standard full-size crib has an interior (mattress) opening of 28 × 52 in (71 × 132 cm) and an exterior footprint of about 30 × 54 in (76 × 137 cm). Assembled height is roughly 35–45 in (89–114 cm).
01What size mattress fits a standard crib?
Full-size cribs are built around the CPSC minimum mattress spec of 27¼ in wide × 51⅝ in long (69 × 131 cm), with a mattress thickness of 4–6 in. There should be no more than two fingers of gap between the mattress and the crib sides.
02Will a crib fit through a door?
Doorway width is rarely the constraint — the ~30 in exterior width clears a standard 32 in interior door, and most cribs ship flat-packed in even smaller boxes. A fully assembled crib being moved between rooms is the ~30 × 54 in constraint.
03Are convertible cribs bigger than standard cribs?
They can be. Convertible cribs (crib → toddler → daybed) often have a larger exterior footprint and taller assembled height than the 30 × 54 in standard, so verify the specific model rather than assuming.
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