Post Topper for 3 Gallon BasketsUse the post topper highlight unused space in your yard or even on your balcony or porch. 3 Gallon Basket Post Topper All Post Toppers fit on top of a standard 4"x4" post that can be purchased at any lumber store, like Home Depot or Lowes and can be any height the customer wishes simply by cutting the 4 inch x 4 inch post to the desired height. The Post Topper is designed to fit the 3 Gallon Bloom Master basket.