The Desire 4-in-1 convertible crib features a beautiful finish over solid wood and different color choices to choose from. The mattress support can be adjusted to one of four level positions, allowing you to lower it gradually as your child grows. Any standard size crib mattress of 52" x 27.5 is compatible. The design to convert the crib into a toddler bed, day bed, or full-size bed adapts to the latest stage of your child's life. The toddler guardrail and stabilizer bar are not included and sold separately, and the full-size conversion rails are sold separately.