How often should I size up baby clothes?

Most babies move through newborn and 0-3m sizes within 6-8 weeks. After that, sizing up every 2-3 months is typical through the first year, though weight and length matter more than age on the label. Check fit weekly for newborns and monthly for older infants.

Is it safe to use worn or pilled baby sleepwear?

No. Pilling and fabric breakdown on flame-resistant sleepwear (the kind required by 16 CFR 1615 and 1616) can compromise the fabric's protective treatment. Replace snug-fit or flame-resistant sleepwear as soon as pilling appears or fit becomes loose.

When should I stop using hand-me-down baby clothes?

Inspect every hand-me-down item before use. Discard any piece with loose buttons, worn snaps, drawstrings on hoods or necks, frayed seams, or faded care labels. Garments more than 5 years old may not meet current CPSC flammability standards; always check the label for compliance language.

Are there safety hazards I should look for in baby clothes?

Yes. The CPSC flags drawstrings on children's upper outerwear as strangulation hazards and issued a strong advisory against them. Also check for loose buttons (choking), decorative appliques that peel (choking), snaps that no longer close securely, and elastic waistbands that have lost tension and could bunch or restrict.

What clothing brands size most accurately for the 0-24m range?

Carter's and Gerber tend to run true to size or slightly large, which many parents prefer. Burt's Bees Baby and Hanna Andersson run generous. Primary and H&M Baby tend to run smaller. Always go by weight and height ranges on the tag rather than the month number.

When to Replace Baby Clothing: Parent Checklist (0-24m)

Quick answer: when the fit changes, the fabric breaks down, or a safety hazard appears

Baby clothes need replacing on a rolling basis, not once a season. Most newborns outgrow their first size within 6 to 8 weeks. Pilling on sleepwear is a real safety issue, not just aesthetics. And certain details, like drawstrings on hoods, should disqualify a garment before it ever goes on your baby. Use this checklist as a monthly scan, not a one-time purge.

Fit: when clothes stop fitting safely, not just comfortably

The most obvious reason to retire a garment is size, but fit problems show up in two directions: too small and, less obviously, too large.

Too small

Clothing that is too small is uncomfortable and can restrict movement. Watch for:

Snaps on onesies that no longer close flat across the belly
Leg openings that leave red marks after 20 minutes of wear
Sleeves that end more than 1 inch above the wrist
Necklines that pull tight and are hard to slide over the head

Carter’s and Gerber mark their garments in weight ranges alongside age labels. If your baby is above the weight ceiling on the tag, size up regardless of age. A 3-month-old who weighs 15 lb has already grown out of the “0-3m” range on most brands, which tops out around 12 to 13 lb.

Too large

Oversized clothing is a safety concern, not just a style issue. Loose fabric around the face or neck, particularly in sleepwear, can bunch against the nose and mouth during sleep. The AAP’s safe sleep guidelines emphasize keeping soft, loose materials away from the sleep environment. A sleeper that hangs significantly past the foot is too large for safe overnight use.

Rule of thumb: if you can pinch more than 2 inches of excess fabric at the torso, the garment is too big for sleepwear. It may still work for daywear with supervision, but retire it from the crib.

Fabric condition: what wear actually looks like

New parents often keep clothing past its safe life because it still “looks fine.” These are the specific signs that a garment has reached its end.

Pilling on sleepwear

This is the one that matters most from a safety standpoint. Baby sleepwear in the US sold above size 9 months must meet CPSC flammability standards under 16 CFR 1615 and 1616. There are two compliance approaches: flame-resistant fabric treatment, or snug-fit construction (no excess fabric).

When flame-resistant sleepwear pills, the fabric structure breaks down. The treatment may no longer be uniform. Pilling is a hard stop. If the garment is snug-fit, check that it still qualifies: if it now fits loosely due to wear or growth, it no longer meets the snug-fit exception and must be replaced.

Snap and button failure

Snaps that no longer click closed, or that open with minimal pressure, are choking hazards. A snap that pops open during a diaper change is a small inconvenience. A snap that opens during sleep and reaches a baby’s mouth is not. Test every snap on each garment before dressing your baby. Replace the garment if even one snap is unreliable.

Decorative buttons on the outside of a garment need a tug test: grip the button and pull with the force a 10-month-old would apply. If it comes off in your hand, it will come off in your baby’s hand. Discard the garment or remove the decoration before use.

Frayed seams and hem tears

Fraying creates loose threads, and loose threads are strangulation hazards for young infants. Run your fingers along all inner seams after each wash. A thread that has worked loose by more than half an inch should be trimmed immediately. If the seam itself is separating, retire the garment.

Elastic failure

The waistband and cuff elastics in pants and footie pajamas degrade with repeated washing. When elastic loses tension, it bunches. A bunched waistband can create pressure on a newborn’s abdomen. Cuffs that no longer grip at the ankle allow footies to slip and bunch underfoot, a trip hazard for walking toddlers.

Test: stretch the elastic to twice its resting length and release. If it snaps back cleanly, it is fine. If it returns slowly or stays stretched, replace the garment.

Safety hazards: non-negotiable retirement triggers

Some garments should be retired or modified the moment a specific feature is identified, regardless of fit or fabric condition.

Drawstrings on upper outerwear

The CPSC has issued explicit guidance against drawstrings in children’s upper outerwear. Drawstrings at the hood or neck of a jacket, sweatshirt, or coat are strangulation hazards. Children can catch a drawstring on playground equipment, car door hinges, or stroller components.

The fix is simple: remove the drawstring. Use a seam ripper or scissors at the exit points and pull the cord out. If the garment cannot function without the drawstring (a rain jacket with a sealed hood, for example), retire the garment entirely. Do not add a knot to the end and call it fixed.

Decorative appliques and trims

Any decorative element that peels, flakes, or lifts at the edge is a choking hazard for babies 0-36 months. This includes:

Iron-on or heat-transfer designs that are lifting at the edges
Plastic eyes or noses on animal-themed garments
Sequins, beads, or rhinestones on any garment for children under 3
Ribbon trim that is unraveling at the knot

Run your thumbnail along every decorative edge at every wash. If any element lifts, the garment is done.

Recall status

Before keeping a gift or hand-me-down, search the brand and product at cpsc.gov/Recalls. Children’s clothing recalls have historically involved drawstring hazards, small parts, and lead content in decorative hardware. A recalled garment should be discarded regardless of its apparent condition.

Hand-me-downs and secondhand clothing: a checklist before use

Hand-me-down baby clothing is practical and reduces waste. It also carries real risks if not screened carefully. Before putting any secondhand item on your baby, check the following 8 points:

Care label intact. If the care label is missing or illegible, you cannot verify fiber content or washing instructions. For sleepwear, a missing label means you cannot confirm compliance with 16 CFR 1615 or 1616. Discard it.
Sleepwear compliance language. Look for “Flame Resistant” or “Snug Fit” language on the label. If neither appears, it is not certified sleepwear. Do not use it as sleepwear.
No drawstrings. As above: remove or discard.
All snaps and buttons secure. Tug test every closure.
No pilling on sleepwear. Discard if pilling is visible.
Seams intact. Check inner seams for fraying.
Elastic functional. Stretch test waistbands and cuffs.
Recall search done. Check cpsc.gov/Recalls before first use.

Brands worth seeking out in the secondhand market because of consistent fabric quality and durable snaps include Carter’s, Gerber, Burt’s Bees Baby, and Hanna Andersson. Hanna Andersson’s organic cotton sleepers in particular are known for holding their shape and snap integrity through 30 or more washes, making them viable hand-me-downs when the checklist above is clear.

For a broader view of clothing safety standards and what to look for when buying new, see our baby clothing buying guide.

Monthly replacement schedule: what to check and when

Rather than a seasonal purge, treat clothing review as a monthly 10-minute task. Here is what to check at each interval.

Every week (newborns 0-8 weeks): Check onesie snap closure, sleepwear fit, and neckline tension. Newborns can gain 5 to 7 oz per week in the first two months, so weekly checks prevent a too-small garment from sitting unnoticed in the rotation.

Every month (2-12 months): Full drawer scan. Pull out each garment and run through the fit and fabric checks above. Anything that fails any check goes in the donate or discard pile that day.

Every 3 months (12-24 months): Add a safety audit of outerwear, jackets, and hooded sweatshirts. At this age, toddlers are mobile and clothing drawstrings become more dangerous. Also check shoes and soft-soled slippers for sole separation, which becomes relevant as walkers develop.

After any illness: Wash on the hottest cycle the fabric allows. If a garment cannot be laundered at 140 degrees Fahrenheit or higher, consider whether it needs to be retired from the rotation for a child recovering from a contagious illness.

Bottom line: replace on condition and fit, not calendar

Baby clothing does not need to be replaced on a fixed schedule. It needs to be replaced when fit is wrong in either direction, when fabric integrity is compromised, and immediately when any safety hazard appears. The monthly 10-minute drawer audit is the most practical system for staying ahead of the curve.

The most important retirement trigger is not sentiment or cost: it is a failing snap, a drawstring, or a pilled sleeper. Those three account for the majority of clothing-related safety incidents in the 0-24m age group.

If you are restocking after a size change, Carter’s, Gerber, and Burt’s Bees Baby offer consistent sizing and CPSC-compliant sleepwear in the 0-24m range. You can search current options on Amazon to compare what is available at your baby’s current size. Always check the label for snug-fit or flame-resistant language before buying any sleepwear.

For more on what to look for when buying new, visit our baby clothing methodology page.