Thomas the Tank Engine and his Friends easy (EZ) fill mylar balloons. These Thomas mini mylar balloons are easy to fill with air and are self-sealing so you don't have to mess with a heat sealer. 9-inch ready to fill balloons with pre-attached cup and straw. You simply attach the straw and blow into the balloon to inflate. Great item for Thomas the Tank Engine theme birthday party decorations or use it as party favors. Approximately 9 inch and sold in packages of 3 balloons.