Earphone jack accessories051 - Double Cross Luxury Swarovski Crystal. Such as mobile phones. It is a commodity that can be attached to the earphone jack (diameter 3.5 mm).Regardless of manufacturer or series, earphone jack diameter is generally 3.5 mm.3.5mm0.1378inch. All of the metal is gold coating. Metal = brass, other. Cross: about 0.78 inches. Made in Japan.Designed by Kisaragi