This chair is designed for a child ages 0-3 years & measures a height of 11.5", an internal seating width of 10" (width including the tenons is 15.5"). The depth of the chair is 10". The chair seat height can also be changed for a height of 5" or 7" to accommodate your child’s growing needs. The chair is constructed with durability in mind & is made of solid poplar & cherry wood (no particle board or plywood} & finished with an all natural polish consisting of coconut oil & beeswax. Simple assembly is required. A hex wrench is provided with complete instructions & two cherry wood tenons. Child’s Chair-Small, Cube Chair, Montessori Weaning Chair