Students tend to focus more when they're in a comfortable classroom chair - this chair has an ergonomic seat shell, vented back and waterfall seat edge. This student stack chair aids proper seating habits for 3rd through 7th graders. Ergonomic shell seat with vented back, black powder coated frame, plastic floor glides Design: stacks up to 15 high, comes fully assembled to use right away Ideal environments: classroom, homeschool, library, recreation centers, after-school centers PRODUCT MEASUREMENTS: Overall Size: 17.25"W x 21.5"D x 29"H; Seat Size: 15.25"W x 13.25"D x 16"H; Back Size: 13.5"W x 15"H; No Assembly Required