??The liner is designed to fit perfectly inside the planter, creating a barrier between the soil and the pot itself. This helps to prevent soil from leaking out of the pot and staining surfaces, as well as protecting the pot from damage caused by water and soil.??Clear Plastic Liner Protects surfaces from water leaks and stains on the planters. ??Please note: sizes are the Planters' sizes, our Liners' sizes can be a bit smaller. ??LINERS' Dimensions: ??4” liner: 3”x 3”x 3.75” ; ??5” liner : 4”x 4”x 4.75” ; ?? 6” liner : 5”x 5”x 5.75” ; ??12” liner : 10.5”x 3” x 3.5” ; ?? 20” liner : 19.5” x 3”x 3.75”