YOYOSTORE 100 X 3mm 5mm Cup Invisible Plastic Earrings Blank Pins with Stud Tiny Head Findings Make (3mm) Approx. size: 11 mm pin length, 1 mm pin thickness, cup wide - 3 mm or 5mm in diameter Material: Plastic Earrings Pin Quantity: 100 Pieces (50 Pairs) come with the back lock