This bendable, reusable wire grid fits a vase with diameter of up to 3.75". To use, simply place on top of your vase and gently push the outer wire arcs down around the rim of your vase until secure. Insert your floral stems through the openings in the grid. To clean, wash with warm, soapy water. You can flatten the grid for storage until the next use. Package includes one 4 inch easy arranger and instructions for use. 4 Inch has 36 openings.