- Size: One size • Exclusively designed by our team in Osaka, Japan. • Adjustable headband thanks to its elastic band, adapting to your personal style. • Allows you to adjust the band to be more spacious or tight for a smooth finish. • Made of rayon, a silky semi-synthetic fabric, more biodegradable and environmentally friendly than nylon. • Approximate measurements: 52 cm wide and 17 cm high. • Casualbox designs and manufactures all its products in Osaka, Japan, with a passion for creating top-level headwear. • We test fabrics from all over the world, from the Aegean Sea to cotton from Punjab, India. • Casualbox has been selling in Japan for years and now offers its products worldwide.