Set of 4 - White Corrugated Plastic Sign Insert, Fits into Most 22&rdquo;w x 28&rdquo;h Holders &ndash; 0.1875" Thick Designed for sidewalks signs that hold 22" x 28" inserts. Coroplast allows you to tack, tape, or print customized signage. Light weight for easy insert and portability. Sold in sets of 4. Displays2go SKU#: CRP2228WHT