Shelf It 4 Pack Heavy Duty Metal Shelf Liners. Each Liner Measures 36" x 14" x 0.03". Liners are made in the USA in our Florida facility. Shelf Liners have pre-cut corners for easy installation on wire shelves. This Shelf Liner keeps small items from falling through the spaces that metal shelving leaves open. Shelf Liner protects your floors and surfaces by forming a solid shelf that is water and spill proof. Shelf Liner is easily cleaned with soap and water. Liner can be used on most shelving to create a stable, flat, solid shelf that will keep your items firmly in place.