SIZE:14.5*9.5CM  One size fits most children comfortably

MATERIALS: Made of High-Quality Soft Non-Woven Polypropylene Fabric ADDITIONAL BENEFITS: Adjustable Nose Strip, Comfortable Soft Elastic Ear Loops with Efficient All Day Breathability. EASY TO USE: Hold the elastic bands over your ears and press the metal strip around your nose to create a light seal around your face. WARNING: Not recommended for children under 36 months.