? PACKACKAGE INCLUDES-- Totally 16 Pcs "Happy Anniversary" letter balloons. Each letter balloon measurement about 16 Inch. It also includes 1 straw & 1 Ribbon. ? MATERIAL-- Made of high quality aluminum foil balloons,environmental protection materials. It is safe and non-toxic, self sealing helps the balloons maintains for nearly 1 week without leaking or losing air. WIDELY APPLICATION-- Use for Marriage Anniversary party celebration outdoor and indoor.