UnCommon Artistry Sterling Silver Large Fancy Earring Backs (Earnuts) (4)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Fancy Sterling Silver Earring Backs (aka "Earnuts")</li><li>These are large and heavy; intended for keeping heavier/larger earrings in place</li><li>Measurements: 9mm Diameter， 4mm deep. *Will accommodate a 20 gauge (.032mm) standard earring post. Please see instructions on how to tighten clutch below.</li><li>Quantity: You get 4 earring backs per sturdy clamshell package (2 pairs).</li><li>*TIGHTENING THE CLUTCH: If you find your posts are too loose， you can tighten the butterfly clutch with some needle-nose pliers. You need to do this very gently in small steps until the tension is tight enough to prevent slippage， without crushing the shape of the clutch itself.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31UAlkylmKL.jpg" noproxy>