These extra wide blue rectangular shaped metal sunglasses with a silver end pieces will fit most big head sizes. They are a generous 152mm wide with quality spring hinges, the frame material is a combination of aluminium and magnesium, narrow (42mm high) style lens made from anti-glare TAC material with UV400 polarized protection, weighing 26.6 grams. Our research confirms that sunglasses that are over 150mm wide AND with spring hinges, will fit head sizes up to at least 65cm circumference.