BTSD-home 3" or 6" Stackable Plastic Bed Risers, Black, 4 Pack Dimensions: Extra 3" high; external size: 385 x 385 x 33 inches; internal size: 325 x 325 x 06 inches Material: Made of sturdy, anti-slip plastic that won't scratch floors; supports heavy-duty furniture up to 2200 lbs Stacking Design: Offers perfect elevation with a stackable option, allowing you to lift furniture to 3 inches or stack for additional height Versatile Use: Ideal for raising desks, chairs, sofas, couches, tables, cabinets, and even Christmas trees Benefits: Increases under-bed storage space, promotes better sleep, and alleviates backache; added height allows for improved airflow and reduced dust accumulation.