A crib is one of the few nursery purchases where the safety rules aren't optional, and getting familiar with them makes comparing models much easier. Here's what to check for safety, what "convertible" actually means long-term, and a look at what MacroBaby carries.
The safety standards every crib must meet
Every crib sold in the US must meet mandatory federal standards enforced by the Consumer Product Safety Commission. The rules that matter most: slats can be no more than 2-3/8 inches (6 cm) apart, to prevent a baby's body from slipping through or their head getting trapped; drop-side rails have been banned since 2011 after hardware failures caused fatal gaps, so every side rail must be fixed in place; and the mattress must fit snugly with no more than about two fingers of gap along any edge. Crib mattresses themselves are also federally regulated for firmness, since a too-soft mattress is a known suffocation risk.
What "convertible crib" actually means
A convertible crib is designed to transition through multiple stages as your child grows, most commonly crib to toddler bed, and in many cases through a daybed or full-size bed frame, sometimes lasting well into school age. The number in a product name like "4-in-1" or "6-in-1" refers to how many of these configurations the crib supports. It's worth checking two things before buying: whether the conversion kit (the toddler guardrail or full-size bed rails) is included or sold separately, and whether you'll need a new mattress size or firmness once it converts, since not every stage uses the same mattress.
Stokke's Sleepi: a different shape entirely
The Stokke Sleepi takes a distinctive approach with an oval-shaped crib rather than the standard rectangle, designed to create a cozier, womb-like space for a newborn. It converts from a compact newborn size into a full-size crib using a separately sold bed extension kit, and later into a junior bed, so the same core frame can realistically last from birth through the early school years.
Mini cribs and space-saving options
For smaller nurseries or families who want a crib that also does double duty, MacroBaby carries options like the DaVinci Charlie 4-in-1 Convertible Mini Crib and Changer Combo, which pairs a compact crib footprint with a built-in changing station, useful for apartments or nurseries where floor space is tight.
Checking a crib before you buy (new or secondhand)
- Measure the slat gaps, no more than 2-3/8 inches apart.
- Confirm there's no drop-side rail, since these have been federally banned since 2011 and are unsafe on older or secondhand cribs.
- Check the mattress fit, no more than about two fingers of gap along any edge once the mattress is in place.
- Look for cutouts in the headboard or footboard, which can create head entrapment risk and shouldn't be present.
- Ask what's included in the conversion kit, since toddler rails or full-size bed frames are sometimes sold separately from the crib itself.
Adjusting mattress height as your baby grows
Most cribs offer two or three mattress height settings. Start at the highest setting for a newborn, since it makes leaning in for late-night feeds easier on your back. Lower it to the middle setting once your baby can roll over, typically by around 5 to 6 months, and move it to the lowest setting as soon as your baby can sit up unassisted or shows signs of pulling to stand, often between 6 and 9 months, since a baby who can pull up is at real risk of toppling over the rail at a higher mattress height.
When to move from a crib to a toddler bed
The American Academy of Pediatrics points to three signals for making the switch: your child reaches about 35 inches tall, the top of the crib rail falls at or below mid-chest (roughly nipple) height when they're standing inside the crib, or they start actively climbing out. Any one of these is a reason to transition, even if the others haven't happened yet, since a toddler determined to climb out is a real fall risk regardless of height or age.
Where to place a crib in the nursery
Keep the crib away from windows, blinds, and curtain cords, since cord strangulation is a known hazard, and away from radiators, heating vents, and direct sunlight through a window, which can overheat a sleeping baby. Avoid placing it near furniture a climbing toddler could use to reach the crib rail from outside, and keep baby monitors and their cords at least 3 feet from the crib per CPSC guidance.
Shop cribs and beds at MacroBaby
MacroBaby's Orlando showroom lets you see the actual footprint, mattress fit, and conversion hardware in person before you commit. Browse the full cribs and beds collection online or visit our showroom.
Frequently Asked Questions
How far apart can crib slats be?
No more than 2-3/8 inches (6 cm), a federal safety standard designed to prevent a baby's body or head from becoming trapped between slats.
Are drop-side cribs safe?
No. Drop-side cribs have been banned from sale in the US since 2011 after hardware failures caused fatal entrapment gaps. Avoid buying or accepting a secondhand crib with a drop-side rail.
Does a convertible crib come with the conversion hardware?
It varies by model. Some cribs include the toddler guardrail and full-size bed rails, while others sell them as a separate accessory, so check the specific product listing before assuming everything is included.
Do I need a new mattress when I convert a crib to a toddler or full-size bed?
Often yes. Many convertible cribs require a different mattress size or firmness once converted, so check the manufacturer's specifications for each stage.
What makes the Stokke Sleepi different from a standard crib?
It uses an oval shape rather than a rectangle, designed to feel cozier for a newborn, and converts from a compact newborn size into a full-size crib and later a junior bed using separately sold extension kits.
When should I lower the crib mattress?
Move it to the middle setting once your baby can roll over, typically around 5 to 6 months, and to the lowest setting as soon as they can sit up unassisted or show signs of pulling to stand, often between 6 and 9 months.
When should I switch my child from a crib to a toddler bed?
The AAP recommends switching once your child reaches about 35 inches tall, the crib rail is at or below mid-chest height when they stand, or they start climbing out, whichever comes first.
