Sterling Silver. These swirl & blade earrings measure ~ 1/2" long by 1/4" wide (~12mm by 7mm) but as they are made by hand, they will vary! They are small earrings with a touch of whimsy with the swirl that represents the puddle made when the blade is pulled through water.  Very cute for certain :o)

The on-ear picture is approximately life-sized, and the other enlarged.  They do come with sterling silver backings.