11-inch Round and Heart-shaped Mylar Balloons Mylar balloons are super easy to customize and fit almost any occasion. Think birthday parties, baby showers, weddings, and national holidays – they sell all year round. These can be used as both indoor and outdoor decorations. They come with a stick so your customers can move them around with ease. Note that these are not helium balloons and won't float on their own – they inflate with air only. Comes in one size – 11" x 11" (27.9 cm x 27.9 cm) – perfect for easy transportation. .:Material: Coated mylar .:One size: 11" x 11" (27.9 cm x 27.9 cm) .:Matte finish .:Balloon stick included .:Suitable for indoor and outdoor use .:Inflate with air only