Make a big statement with our Happy Birthday Dark Navy Blue Yard Signs . Our yard signs are printed on weather resistant corrugated plastic and come with metal stakes so that they are free standing. Works great outdoors on grass or soft soil. Whether it's for birthdays, school events, graduation, weddings, anniversaries, or any commemorative occasion, you’ll catch everyone’s attention with our yard letters! Printed on one side only. Includes metal stakes. Corrugated plastic. Each letter is approx. 20” x 20”. Simple assembly required. Note: Yard stakes may be sharp please exercise caution when assembling. Signs are not designed for use in extreme wind or weather conditions.