665x399pxoutdoor billboard advertising, monochrome digital billboard, black and white sign, rectangle billboard structure, large format display, urban marketing visuals, street-level promotion
428x706pxgray metal frame billboard, glass blank billboard material, monochrome advertising sign, white rectangle poster, frameless display area, minimalist signage template, clean design board
666x1000pxempty billboard post, monochrome advertising column, classical pattern placard, blank outdoor sign, vintage street display, ornate metal frame, empty poster stand
