Safety first Always: This crib is JPMA Certified to meet or exceed all safety standards set by the CPSC & ASTM. All of our products are tested by 3rd party labs for lead and other toxic elements to meet or exceed CPSC and ASTM safety standards 5-IN-1 Convertible crib: A lifetime investment, the Synergy grows with your child, easily converting from a crib into a toddler, day and full-size bed; Toddler guardrail, stabilizer and full-size rail sold separately. Features 4 mattress height settings 13 Attractive finishes: Bring your nursery dreams to life with the Synergy. Whether you are thinking of creating an ocean-themed nursery, a whimsical mermaid themed nursery or a minimalist modern nursery, the Synergy gives wings to your imagination Our cribs are built to last: Constructed out of solid reclaimed New Zealand Pine wood, the Synergy is a durable crib that will last you a lifetime. With a classic design, this crib offers your little one a sleeping space that will never go out of style Mattress compatibility: The Synergy 5-in-1 Convertible Crib is a standard full size crib and measures 53.0" L x 29.0" W x 39.0" H inches. For the best fit, we recommend any Dream On Me or Evolur full-size, non-toxic, Greenguard certified mattress