"Very Important The price shown on this page is for ONE piece of poster. The numbers/names shown in the Pattern drop-down listing represent that marked on each poster. - Material - Our posters are printed on durable thick canvas with a flat texture; refer to the picture marked Material Details for a detailed display. - Size - Several sizes are provided; refer to the picture marked Size Guide for a size comparison. cm-inch conversion 13x18cm = 5.12x7.09\" 20x25cm = 7.87x9.84\" 21x30cm = 8.27x11.8