A bracelet is one jewellery item she will see all the time, so she can appreciate it often. She also enjoys the feeling of it on her wrist reminding her of you.
Some bracelets are available in different lengths. So before you purchase, be sure to measure one of her other bracelets to be sure she doesn't need a special length.
Bracelets are usually worn on occasions when she isn't working with her hands. Even when not working, a bracelet's proximity to the hands causes it to get bumped and banged, so it must be very durable. Jewellery designers take this into account, so you can be sure the bracelet you choose will last.