Safe Sleep Guidelines & Crib-to-Toddler Transition

Informational only — not medical advice. This page summarizes publicly available guidance from the American Academy of Pediatrics (AAP), the U.S. Consumer Product Safety Commission (CPSC), the National Institutes of Health (NIH / NICHD), and the CDC as of mid-2026. It is educational content for general information only and is not medical advice. Every family is different: see or contact your pediatrician / pediatric healthcare provider for recommendations specific to your child. Follow the manufacturer’s instructions for any crib or conversion kit and check SaferProducts.gov for recalls. Guidelines can change; verify current sources linked below.

Creating a safe sleep environment is one of the most important things parents can do in the first year. Current guidance from the American Academy of Pediatrics (AAP) and the U.S. Consumer Product Safety Commission (CPSC) centers on a firm, flat, non-inclined sleep surface that meets federal safety standards, with nothing soft or loose in the sleep space.

Every full-size crib sold by Heirloom Cribs and More is designed to meet or exceed the applicable federal requirements (including ASTM F1169 and CPSC 16 CFR 1219 for full-size cribs). Our solid-hardwood 4-in-1 convertible cribs begin as a safe infant sleep space and later convert to toddler bed, daybed, and full-size bed using the included conversion kits — so the same high-quality piece supports safe sleep and long-term use.

The ABCs of Safe Infant Sleep (AAP / CPSC summary)

A – Alone

Babies should sleep alone on their own sleep surface. Room-sharing (crib or bassinet in the parents’ room) is recommended for at least the first 6 months, and ideally up to 1 year, but bed-sharing is not recommended because of increased risk of SIDS, suffocation, or strangulation.

B – on the Back

Place your baby on their back for every sleep — naps and nighttime — until 1 year of age. Once a baby can roll both ways independently, they may change position during sleep; continue to start them on their back.

C – in a Crib (or other approved sleep product)

Use a crib, bassinet, portable crib, or play yard that meets current CPSC safety standards. The mattress must be firm and flat (non-inclined; surfaces with an incline greater than 10 degrees are not safe for infant sleep). Use only a tightly fitted sheet. Nothing else belongs in the sleep space.

Bare is Best

Keep soft objects, loose bedding, pillows, quilts, comforters, bumper pads, stuffed toys, and weighted blankets or weighted swaddles out of the crib. These items increase the risk of entrapment, suffocation, or strangulation. A wearable blanket or sleep sack is the preferred way to keep baby warm if needed.

Additional key points drawn from current public guidance

  • Move your baby to a firm, flat sleep surface as soon as practical if they fall asleep in a car seat, stroller, swing, or other sitting device.
  • Check SaferProducts.gov and sign up for CPSC recall notifications. Never use a crib that is broken, missing parts, or has drop-side rails.
  • Avoid overheating; dress baby appropriately for the room temperature.
  • Human milk feeding is associated with a reduced risk of SIDS; discuss feeding plans with your pediatrician.

Sources

How a Compliant Full-Size Crib Supports Safe Sleep

A full-size crib that meets ASTM F1169 and CPSC 16 CFR 1219 provides:

  • Fixed sides (no drop-side rails)
  • Slats spaced no more than 2⅜ inches apart
  • A firm mattress that fits tightly with no gaps
  • Corner posts that do not exceed allowable height
  • Hardware and structural integrity designed to current standards

Heirloom Cribs’ Old Time Oak and Fisher Quality Products collections list the relevant certifications on the Safety & Certifications page. Select models also carry GREENGUARD Gold certification for low chemical emissions. Always follow the assembly instructions and periodic hardware checks provided with your crib.

When to Transition from Crib to Toddler Bed

There is no single magic age. Most children move between approximately 18 months and 3 years. AAP and CPSC guidance point to two practical triggers for leaving the crib — reaching roughly 35 inches (89 cm) in height, or beginning to climb out of the crib. Practical readiness signs include:

  • The child is attempting (or succeeding) to climb out of the crib.
  • The child has reached about 35 inches (89 cm) in height, or the crib railing is at or below chest/nipple level when the child is standing.
  • The child shows interest in a “big-kid bed” and has enough impulse control to stay in an open sleep space after bedtime.
  • Nighttime potty needs make a lower, open bed more practical.

If the child is content, safe, and not climbing, many families find the transition smoother closer to age 3, when impulse control is typically stronger. Safety comes first: once climbing begins or height reaches the threshold, moving to a lower toddler bed reduces fall risk from crib height. Discuss timing with your pediatrician, especially if you are unsure whether a sign applies to your child.

Making the Transition with a 4-in-1 Convertible Crib

Because Heirloom 4-in-1 cribs convert to a toddler bed (and later daybed and full-size bed) with the included kits, the same solid-hardwood frame continues to serve the family. General practical steps many parents follow:

  1. Confirm the child meets one or more readiness signs above and discuss timing with your pediatrician if needed.
  2. Lower the mattress to its lowest setting while still in crib mode if climbing has not yet started.
  3. When ready, install the toddler-bed conversion kit per the manufacturer instructions (rails/slats as supplied).
  4. Keep the same bedtime routine. Expect some boundary-testing; calmly return the child to bed without lengthy interaction.
  5. Child-proof the room (secure furniture, cords, outlets, and remove hazards) because the child can now leave the bed.
  6. Continue a firm, appropriately sized mattress and fitted sheet; keep soft objects out of the sleep area during the early transition period as appropriate for the child’s age and developmental stage.

Quick FAQ

What should be in the crib with my baby?

Only a firm mattress that fits tightly and a fitted sheet. Nothing else — no pillows, blankets, bumpers, toys, or positioners.

Is an inclined sleeper or rocker safe for infant sleep?

No. Current guidance states that sleep surfaces with an incline greater than 10 degrees are not safe for infant sleep. Transfer the baby to a firm, flat surface as soon as practical.

When is it time to stop using the crib?

When the child begins climbing out, reaches approximately 35 inches tall, or the rail is at chest level. Most transitions occur between 18 months and 3 years; follow your child’s cues and pediatrician guidance.

Do Heirloom cribs meet current safety standards?

Yes. Full-size cribs in our collections are certified to the applicable ASTM and CPSC standards listed on our Safety & Certifications page. Always assemble and maintain the crib according to the included instructions.

Can the same crib become a toddler bed?

Yes. Our 4-in-1 convertible models include conversion kits that allow the crib to become a toddler bed, then daybed, then full-size bed.