I needed this in a hurry a few years ago and bought it on the spot. I only used it for an hour and was done. I've kept it in storage since then. Please refer to the photos for the size. ~AI Generated~ This is a black swim cap made by Mizuno, approximately 22cm x 27cm in size, offering a comfortable fit. - Brand: Mizuno - Color: Black - Size: Approximately 22cm x 27cm Thank you for looking.