OULII 12 Inch Latex Metallic Balloons, Bright White (Pack of 100) Color: White. Material: Elastic latex. Type: Metallic balloon. Size: 12 inch (inflated). Suitable for most occassions such as parties and celebrations. These are large bright colored latex balloons will decorate your event in a colorful way. They have hundreds of uses and are perfect for filling with helium.