Displays2go Set of 2 - White Corrugated Coroplast Sign Boards, 22x28", 3/16" Thick (CRP2228WHT) 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. Displays2go SKU#: CRP2228WHT