A single round-cut cubic zirconia set into an organic nugget bezel, silver-finished, sitting at just 8-9mm total — small enough to disappear into an ear stack, bright enough to hold its own alone.

Pure White Round-Cut Cubic Zirconia diameter: 6 mm
Total stud earring diameter including the Organic Bezel: about 8 mm/9 mm

By far the easiest and safest way to clean your jewellery is with warm water and  detergent-free soap. Then, run it under some clean water and dry the piece carefully with a jewelry cloth.