COMFORTABLR AND DURABLE: High elastic swimming cap can automatically adjust and adapt to your head according to your head perimeter. Additional ear protection space reduces the pressure on the ears while swimming. Flexible, comfortable, safe and reliable. NON-TOXIC, ENVIRONMENTALLY-FRIENDLY AND HYPOALLERGENIC. ONE SIZE FITS MOST OF PEOPLE: Extremely flexible swimming cap, easy to put on and take off without snagging hair. It is perfect for male, female, adults, kids, short, medium or long hair. 9.06" L x 7.87" W x 7.87" H