These small, rainbow shaped test tube planters are lightweight so they can be hung on a nail or using nail-free options. The minimalist design blends beautifully with a variety of home décor styles. Wooden Test Tube Holder: 4.75 in. tall x 3.25 in. wide - Plastic Test Tube: 5.5 in. tall x 1 in. wide - Total Height Assembled: 7.5 inches tall (measurements are approximate and vary slightly) This item is handmade from mahogany plywood with a warm brown tone. The material can be damaged by moisture. When refilling, remove the test tube to fill with water and wipe away any moisture on the outside before returning to the holder.