How to Pick a Crib? | Safety Rules That Matter

Pick a new crib that meets current CPSC standards, with a firm, snug mattress and no drop-side rail.

Choosing a crib comes down to one question: does it meet the safety standards that keep a sleeping baby safe? New cribs sold in the U.S. must meet federal safety rules, and the Consumer Product Safety Commission (CPSC) publishes clear guidance on what makes a crib safe. The firm, tight-fitting mattress matters just as much as the frame itself.

What Makes A Crib Safe?

A safe crib meets several concrete standards you can check yourself.

• Slats no more than 2 3/8 inches apart — about the width of a soda can.
• A firm mattress that fits snugly with no more than two adult fingers’ space at the sides.
• No drop-side rail, which the American Academy of Pediatrics warns against.
• No decorative cutouts in the headboard or footboard that could trap a child.
• No raised corner posts taller than 1/16 inch that could snag clothing.
• All hardware present and tight — no missing, loose, or broken screws or brackets.

Lower the mattress as your baby grows so climbing can’t become an option.

How To Inspect A Crib Before Buying

Whether you’re shopping new or used, a five-minute inspection tells you most of what you need to know.

Start with the label. A compliant crib carries the manufacturer or importer name, model number, date of manufacture, and instructions. Then measure the slat spacing, press on the mattress to confirm it’s firm, and check that it leaves no gap wider than two fingers. Run your hand over the headboard and footboard for cutouts, and eyeball the corner posts for anything that protrudes. Finally, check the hardware: every screw, bracket, and support piece should be present and tight.

For used cribs, add two more steps. Compare tested budget crib options that meet current standards before shopping secondhand. And avoid cribs older than 10 years, since they may predate current federal rules. Cribs made before 1978 could carry lead-based paint, so they’re out entirely.

Picking The Right Mattress

The mattress is half the safety equation, and the rules for it are precise.

Firmness matters most: a soft mattress lets a baby’s face sink in, which is why CPSC and pediatric guidance both call for firm. The fit check is simple — once the mattress is in the crib, no more than two adult fingers should fit between mattress and frame. Strip off plastic packaging before first use.

Common Crib Mistakes To Skip

Most crib-related injuries trace back to a handful of avoidable errors.

• Buying a drop-side crib.
• Using a soft mattress or one with gaps at the sides.
• Choosing slats too far apart or a headboard with cutouts.
• Adding pillows, blankets, or stuffed animals to the sleep space.
• Using a used crib without checking its label, age, and recall history.

Back-sleeping and an empty crib round out the safe-sleep picture, per HealthyChildren.org.