Do toddler beds use a crib mattress?

Most traditional toddler beds in this roundup (Dream On Me Classic, Dream On Me Finn, Delta Children Canton) are sized to take a standard crib mattress, which lets parents reuse the mattress from the crib. Montessori and travel options vary: some floor beds fit crib-size mattresses while twin and full floor frames require larger mattresses sold separately. Always confirm the listed mattress size before buying, since mattresses are typically not included.