Crib Safety Standards in the US: Is My Crib Safe? A Plain Guide for Parents

If you're standing over a crib — new, secondhand, or handed down from a cousin — wondering whether it's genuinely safe, you're asking exactly the right question. In the United States, cribs are regulated by the Consumer Product Safety Commission (CPSC), and the standards changed significantly in 2011 in ways that make a real difference to which cribs are safe to use today.

We're a UK-based team, so we'll be clear that everything below describes the US framework — the CPSC and the federal rules that apply to cribs sold and used in America. We'll describe the well-established facts qualitatively and, where a specific detail depends on your exact crib, we'll tell you honestly to check the label or look it up rather than invent a number.

The reassuring truth is that a modern, standards-compliant crib with a proper mattress and nothing added to it is one of the safest places your baby can sleep. Most of "is my crib safe?" comes down to a short, checkable list — so let's work through it. For the sleep practices that go with the crib, our AAP safe sleep guidelines guide is the companion to this one.

In 2011, the CPSC put in place stronger mandatory federal safety standards for full-size and non-full-size cribs. The most visible change: traditional drop-side cribs were effectively banned. You cannot manufacture or sell them, and they should no longer be used.

A drop-side crib had a side rail that slid down so a parent could reach in more easily. The problem was in the hardware: the sliding mechanism could loosen, warp, or detach over time — creating a gap between the rail and the mattress where an infant could become entrapped. This was linked to infant deaths, which is what drove the ban. It's a clear example of "older isn't always fine": a drop-side crib passed down through a family is exactly the kind of hand-me-down that is no longer safe to use, regardless of condition.

The 2011 standards also tightened rules around crib slats, hardware durability, mattress supports, and testing. The practical headline for parents: a crib manufactured after June 2011 was built to these stronger standards. That manufacture date becomes a key thing to check, which is exactly what we'll do with a secondhand crib next.

A hand-me-down crib can be perfectly safe — or quietly not. Run through this before your baby ever sleeps in one:

• Manufacture date after June 2011. Look for the date label on the crib (often on the frame or mattress support). If it predates the 2011 standards, or you can't confirm the date, don't use it. Older cribs may not meet current requirements.
• Not a drop-side crib. If any side rail slides up and down, retire it — no exceptions.
• Slat spacing about a soda-can width. The gaps between crib slats should be narrow enough that a baby's head, body, or limb can't slip through or get trapped. A well-known rule of thumb: the gap should be no wider than a standard soda can. If a soda can passes easily between the slats, the spacing is too wide and the crib isn't safe.
• No missing or improvised hardware. Every screw, bolt, and bracket should be the correct, original part and firmly tightened — no substitutes from the junk drawer. Missing or wrong hardware can cause the crib to loosen or collapse. If you don't have the original instructions and hardware, don't guess.
• No cracks, splits, cutouts, or peeling. Check for cracked or splintered wood, decorative cutouts in the headboard (which can trap a head), and peeling paint or finish.
• No recalls. This is the big one — search the make and model at cpsc.gov using their recall search before you trust it. A crib can look flawless and still have been recalled for a defect you can't see.

If you're also inheriting a bassinet, our guide on when to move baby from bassinet to crib covers the same secondhand-safety mindset for that stage.

This section matters, so we'll handle it carefully and factually. Over the past several years, a category of products marketed as infant "sleepers" that positioned babies on an incline was linked to infant deaths and subsequently recalled. The most widely known was the Fisher-Price Rock 'n Play, which was recalled after being associated with infant fatalities; a number of other inclined sleep products were recalled in the same wave.

The safety lesson underneath all of it is simple and it applies to every product, not just the recalled ones: babies should never sleep on an inclined surface. An incline can allow a young baby's head to fall forward or the baby to shift into a position that compromises their airway, and it can contribute to a baby rolling into an unsafe position. This is why the AAP is firm that a safe sleep surface is firm, flat, and level.

In practice, this means: no inclined sleepers, no wedges, no "loungers" or pillows used for sleep, and no propping the crib mattress up at an angle (even if you've read that it helps with congestion or reflux — that's not a safe workaround, and you should ask your pediatrician about safe alternatives instead). If your baby has reflux or breathing concerns, that's a conversation for your pediatrician, never a reason to incline the sleep surface.

Federal action has since tightened rules around infant sleep products to address exactly this category — but the takeaway for you as a parent doesn't depend on the regulatory details: flat and level, every sleep.

A safe crib needs a mattress that fits it. A gap between the mattress and the crib sides is an entrapment and suffocation risk — a baby can slip into it. The simple, well-established check is the two-finger rule:

There should be no more than about two fingers' width of gap between the mattress and any side of the crib. If you can fit more than two fingers into the gap, the mattress is too small for the crib and isn't safe to use with it.

Alongside a snug fit, the mattress itself should be:

• Firm and flat — it should spring back, not conform to your baby's head. A firm mattress is a safety feature, not a comfort compromise.
• The right size for the crib — use the mattress designed for your crib type rather than mixing and matching.
• Covered only with a snug-fitting sheet — no extra padding, mattress toppers, or quilts underneath or over the sheet.

Lower the mattress support to a safe height as your baby grows and begins to sit and pull up, so they can't tip over the rail. This is one of those small adjustments that's easy to forget and genuinely important.

Once you have a safe, standards-compliant crib and a well-fitting firm mattress, the last job is keeping it bare. Here's what to leave out, and why:

Item	Why it's out
Crib bumpers (padded, mesh, or "breathable")	Banned from sale federally under the Safe Sleep for Babies Act. Associated with suffocation and entrapment risk.
Weighted blankets and weighted sleepers	Not recommended for infants. Use a plain sleep sack for warmth.
Sleep positioners / "nests"	Not recommended; associated with deaths. Nothing should hold a baby in place.
Loose blankets, quilts, comforters	Suffocation and rebreathing risk. A sleep sack replaces them.
Pillows	Not for infants — suffocation risk.
Stuffed animals and soft toys	Keep them out of the sleep space entirely.

The crib bumper point is worth underlining because bumpers were sold for decades and many parents assume they're standard: under the Safe Sleep for Babies Act, the sale of crib bumpers is prohibited federally in the US. If you have inherited a set with a hand-me-down crib, throw them out rather than use them.

Warmth is the one legitimate need people try to solve with these items, and the answer is always the same: a correctly sized sleep sack chosen for the room temperature. It keeps your baby cozy with nothing loose in the crib. Our when to stop swaddling guide covers the related transition out of swaddles and into sleep sacks.

Here's everything above, boiled down to a run-through you can do in a few minutes before the first sleep:

• Manufactured after June 2011, meets current CPSC standards
• Not a drop-side crib
• Slat gaps no wider than a soda can
• All original hardware present and tightened; no cracks or cutouts
• Checked for recalls at cpsc.gov
• Firm, flat, level mattress with no more than two fingers' gap on any side
• Snug fitted sheet only — nothing else on or under it
• Completely bare: no bumpers, blankets, pillows, toys, positioners, or weighted items
• Mattress lowered to a safe height as your baby grows
• Clear of cords, blind pulls, and hanging items within reach

Get those right and you've built one of the safest sleep spaces there is. If you'd like the full picture — safe setup plus gentle, workable sleep habits — laid out as a calm, worldwide-friendly plan, our online sleep course brings it together. For anything specific to your baby's health or a product you're unsure about, your pediatrician and cpsc.gov are your authorities — and for any emergency, call 911.