Large Creole Silver Twist EarHoops. Classic, Italian machine-made, a smart look that has been around since the mid 1900s. The above pair is probably about as big as it gets; any bigger and the weight gets up there. The above are not too heavy for most, each weighing 6grams.
The earclip mechanism is simple and easy to work: the post is hinged one end and slots into a “saddle” at the other. They can be put on either from the front or the back of the ear. The “saddle” can be kept a firm fit for the post simply by squeezing, narrowing the aperture.
The above Large Creole Hoops are hollow; they would indeed be far too heavy were they not hollow.