Public Health Retail Sale Sign Window Posters - Public Health Business Store Signage. Retail Sale Sign Window Posters - With 3 designs and 3 sizes of sale signs to choose from 22" x 28", 25" x 33", and 38" x 50". CDC guidelines Signs allow you to promote public health and CDC guidelines for wearing mask for stop the spread and six feet apart for social distancing. Retail Merchandising Signs LLC signs are proudly manufactured by us in the USA. Price breaks are at 5 and 10 window posters.