Everyone needs at least a few different sizes and styles of ball studs in their jewellery box and you can be assured of swift change overs with these 4mm, andralok ones in gold plated sterling silver. The all-in-one design removes the danger of the dreaded lost earring back saga during busy mornings and as a bonus they're comfy enough to sleep in too! The pins are 11mm long and this pair of studs weigh 0.4 grams for the pair.