Approximate size of used pallet racking: 48” x 48” x 54”. Pallet stacking frames or Tier Racks clip on to a standard 48 x 48 pallet and allow you to stack them on top of each other going 4 high without crushing your product. Works great for boxed items, rolled goods, palletized product and even a 48×40 pallet load will fit inside this rack. The last picture shows some yellow used pallet racks of the same design just a little taller. You can buy them both together or separate them.