It is this plastic soil mat features that can prevent the soil from leaking out because of its leak-proof design. It is this mesh pad features that can prevent the roots from rotting and let the plants grow better because it allows the air flow into the pot. This item is well made of plastic for durable and practical use. Set 1 has 10 pieces of 8cm Mesh Pads; set 2 has 10 pieces of 10cm Mesh Pads; set 3 has 10 pieces of 12cm Mesh Pads; set 4 has 5 pieces of 15cm Mesh Pads; set 5 has 10 pieces of 5cm Mesh Pads; set 6 has 5 pieces of 20cm Mesh Pads; set 7 has 5 pieces of 18cm Mesh Pads. The mesh pad is used to place on the bottom of the ceramic basin or flower pot which has small holes, it minimizes soil from migrating out of the pot drain hole keeping your deck, house, or table clean. Item Name: Mesh Pads Material:Plastic Size: 18 cm: 18cmx18cmx0.5cm/7.09inx7.09inx0.2in 20 cm: 20cmx20cmx0.5cm/7.87inx7.87inx0.2in 5 cm: 5cmx5cmx0.5cm/1.97inx1.97inx0.2in 15 cm: 15cmx15cmx0.5cm/5.91inx5.91inx0.2in 12 cm: 12cmx12cmx0.5cm/4.72inx4.72inx0.2in 10 cm: 10cmx10cmx0.5cm/3.94inx3.94inx0.2in 8 cm: 8cmx8cmx0.5cm/3.15inx3.15inx0.2in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 5 X 18cm Mesh Pads or 5 X 20cm Mesh Pads or 10 X 5cm Mesh Pads or 5 X 15cm Mesh Pads or 10 X 12cm Mesh Pads or 10 X 10cm Mesh Pads or 10 X 8cm Mesh Pads