One (deflated) NEW mylar balloon. Once inflated, the balloon is approximately 2 feet tall and 1.5 feet wide. Can be inflated by mouth, or with helium if you want it to stay up in the air. Re-sealable. If you're inflating it by mouth, use a straw to poke through opening and blow air through the straw into the balloon. The straw needs to be fully inserted, not just poking in the hole a bit. A cute photo prop or party decoration at an engagement party, bridal shower, bachelorette party, or wedding!