1.[Set of 4 12 Inch Bed Risers] Set of 4 Bed Risers= 5in4 (Large) & 3in4 (Medium) & 1in16 (Small)& 4(Base)= Total 28 Pieces, height adjustable from 1 to 12 inch, add a level of comfort in your life. The furniture risers are 2.78 inches wide and 0.7 inch in depth, giving a strong base for furniture legs. 2.[Eight Different Heights Options] These stackable furniture risers from 1 to 12 inch are easy to use alone to get 3 inch or 5 inch height, or stack together to get 1, 2 , 4, 6 , 7, 8, 9, 10,11 or 12 inch height. Bed lifts risers can be placed under desk, table, couch, chair, sofa, nightstands to meet your different heights needs. Bed risers 8 inch heavy duty can be stacked to whatever height you desire. Adjustable bed risers can be stacked together when not in use to conserve space. 3.[Practical And Versatile Bed Raisers] These bed lifts risers not only make it easy for robotic vacuum go under furniture without getting stuck, but also raise furniture for additional storage space underneath. Couch risers also make it easier for elderly, tall, or disabled person to get up from the couch and elevate a workbench to bid farewell to back pain, and even lift the head of bed to help nighttime reflux issues. 4.[Sturdy Bed Risers ] Our table risers are made of high quality thickened PP plastic, which is strong enough to support any heavy furniture for home or office. The internal reinforcement ribs design greatly increases its load-bearing capacity. They can ly support a total of up to 2000 lbs (when bed frame risers are used together). The bed risers heavy duty can carry the weight of bed raisers for dorm twin xl, king size bed, queen bed, etc.