A modern convertible crib made from solid birch hardwood, the Oeuf Sparrow Crib has been a nursery bestseller since 2005. It fits a standard crib mattress and offers three adjustable mattress heights to support a baby from newborn through sitting and standing. With the Sparrow Conversion Kit, sold separately, the crib swaps one side panel to become a toddler bed suited to children up to about age 5 to 6 or 45 inches tall. GREENGUARD Gold certified and finished with non-toxic, water-based coatings, it is ethically crafted in Europe and measures 54 inches long, 29.5 inches wide, and 36 inches high.