It fits under a bed that is at least 12" off the floor.
The full size trundle is made from 2" x 4" and 2" x 8" pine.
Note: The average mattress thickness for a trundle bed is 6". You can use up to a 7" thick mattress with this bed, but 6" thick is best.
Pictured is a full trundle under a full bed. Check here for pricing
