3 in 1 Plyometric Box: 16"x20"x24" Flatpack Three sizes in one box! 16", 20", and 24" Crossfit, MMA, Aerobic conditioning, plyometric exercise, athletic training, jump box, step box Box jumps, step ups, box dips, curls, squats, inclined/declined pushups, planks Flatpack, ships flat to save on assembly and shipping costs. Includes assembly screws, wood glue, and easy to follow assembly instructions. Made in USA using quality 3/4" domestic plywood. Custom made in a professional cabinet shop.