https://www.walmart.com/ip/3-1-Plyometric-Jump-Box-Fitness-Foam-Plyo-Box-Squat-Box-Jumps-Height-Adjustable-14-16-20-Inch-Agility-Workout-Home-Gym-Training-Conditioning-Strength/14804614168

smaller version https://www.walmart.com/ip/3-1-Plyometric-Jump-Box-Fitness-Foam-Plyo-Box-Squat-Box-Jumps-Height-Adjustable-12-14-16-Inch-Agility-Workout-Home-Gym-Training-Conditioning-Strength/14793067134?athAsset=eyJhdGhjcGlkIjoiMTQ3OTMwNjcxMzQiLCJhdGhzdGlkIjoiQ1MwMjAiLCJhdGhhbmNpZCI6IjE0ODA0NjE0MTY4IiwiYXRocmsiOjAuMH0=&athena=true

Plyo Box info https://www.vevor.com/diy-ideas/choosing-the-best-plyo-box-sizes/?_batch=20260129_111021&srsltid=AfmBOopCMOdI9YGBd_is1FB0HemHIixRLbjrKmJP4HneVCOCEvxr_S6D

16 18 20 black https://repfitness.com/products/3-in-1-soft-plyo-boxes?variant=41067595333790

stackable (very expensive) https://repfitness.com/products/stackable-soft-foam-plyo-box?variant=41067578720414