These are handmade at the time of order and are made using high-quality stretchy cord and beads. However, they are delicate, and I recommend you do not wear while sleeping, swimming, bathing, or working out. One size fits most. Standard bracelet size is 7 inches. If you need a custom size, please message me. Please measure your wrist before ordering. I am happy to do any size you need. If ordering for a child, the recommended bracelet size is 5 inches, but again, please measure before ordering to ensure correct fit. I recommend adult supervision if a child is wearing these, as they do contain small pieces. All jewelry comes in a pink holographic bag inside of a pink bubble mailer. (See photos in listing).