Boyd’s Bible Dictionary:

A wrist and arm ornament worn by both sexes (Gen. 24:30; Ezek. 16:11). A badge of royalty, and worn above elbow (2 Sam. 1:10).

Concise Bible Dictionary:

There are five Hebrew words thus translated. In 2 Samuel 1:10 the bracelet found on Saul’s arm was either an armlet or a “chain,” as the same word is translated in Numbers 31:50. In Genesis 38:18, 25 the Hebrew word signifies “cord,” and was probably the cord by which the signet was suspended. The Eastern nations were and still are fond of ornaments round their wrists, arms, and feet, many being of elaborate design and skillful workmanship.
Copper bracelet with two brass brands—1900s—US