Copper Tone Wire Wrapped Clip-on Earrings, about 12mm, Handmade in USA by Earlums Copper Tone Wire Wrapped Clip-on, Fashionable Finger Pressure Keloid Scar Concealment Earrings Soft anodized copper tone aluminum wire, about 12mm(.048 inch) diameter on both sides Handmade design, provides uniform pressure over the earlobes whithout discomfort There is no soldering, no gluing, no screws, clasps or mechanisms to hold them on the ear. PLEASE, READ THE PRODUCT DESCRIPTION ENTIRELY BEFORE PURCHASE! The more pressure/squeezing applied, the better retention!