400 (200 Ea, 1.0/.5mm Hole Size) Very Small Plastic, Rubber Ear Nut Clutches, Earring Backs, Soft Bullet Cone Style Very Small Bullet/Cone shape (soft), Two different hole sizes to help with thin ear wires. Quantity: Approx. 400 (FOUR HUNDRED) pieces, 200 .5mm Hole, 200 1mm Hole Tiny Rubber Ear Backs are perfect for keeping those earrings on your ear as well as backs for your post earrings. Size 1: 4mmx4mm .5mm Hole, Size 2: 4x3.5x3.5mm 1mm Hole Check Size BEFORE Ordering; Read DESCRIPTION Below; Draw the measurements with a ruler and refer to additional pictures to assist with size. Earrings (not included) demonstrate size/use.