12" Metallic Latex Balloon Festival Colours. Metallic latex balloon in value pack of 50pcs at promotional prices. Helium quality grade latex balloons. Sold in uninflated without helium. Balloon size (after inflation) is about 12 inches. Princess colors latex balloons are suitable for any festive party such as Christmas and New Year. Simply mix and match these latex balloons with your party themed foil balloons to create the perfect party look.