The Dream on Me Circular Crib Mattress is unique in its circular shape, measuring 42 inches in diameter and firmly supports your baby for a restful sleep. This mattress is proudly Made in the USA and constructed with quality materials featuring a cloth boarding binding. The 5 inch foam core is enclosed in a fully washable, fire retardant, antibacterial, hypoallergenic, triple laminated cover. The mattress is free of phthalates and lead.Fits The Dream on Me Posh Sophia, Circular Crib and most standard round cribs. This exceptional Mattress carries a 15 year warranty against defects in workmanship and meets the Federal Flammability Standard 16CFR 1632.