Measurements: 23-3/4 in. x 23-3/4 in. Finish: Iron Oxide Patina Material: PVC Installation Method: Glue-up (Instant Grab #310) / Drop-in (Grid System) NOTE: Hand-painted ceiling tiles are NON-RETURNABLE. We highly recommend you buy a tile sample before placing your order to make sure it meets your expectations. Disclaimer: Faux patina is a technique created by activating paints containing metal fragments that oxidize as a result of a chemical reaction, just like in real life, but much faster, resulting in differences between tiles with the same finish, although they remain quite similar. Difference between low luster and gloss finish sheen, view here.