Plastic sheets – matte shelf inserts These matte plastic sheets fit our TUBO shelves in size 60 x 36 cm and work as inserts or shelves on wire shelving. The matte sheets are slightly more transparent than our frosted version, yet still offer a subdued and elegant appearance. Dimensions: 58.5 × 34 cm. Surface: Matte The image shows the three variants: frosted, matte and white. Note: The matte version is the most transparent of the three.