Size is approx; 57.0 by 3.0 by 1cmAdditional product info: – This is a neck strap with an adjustable length slider part, allowing you to adjust to your preferred length, and a safety part that separates the strap when strong force is applied. – This product uses stainless steel. If you experience any allergic reactions or abnormalities on your skin, stop using it immediately and consult a doctor. – Do not give it to infants and young children. There is a danger of accidental ingestion or strangulation with the strap cord. – Do not wrap the strap cord around fingers or other parts of the body. It can cut off circulation and be dangerous. – Do not run, jump, or jump off high places with a smartphone attached to this product, and avoid rough use. Excessive force can cause the smartphone to fall.