Size is approx; 57.0 by 3.0 by 1cmAdditional product info; This is a neck strap that comes with a length adjustment slider part 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 abnormal sensations on your skin, stop using it immediately and consult a doctor.- Do not give it to infants and young children. There is a risk of accidental ingestion or strangulation with the strap string.- Do not wrap the strap string around fingers or other parts of the body. It may cut off circulation and is dangerous.- Do not use this product while a smartphone is attached in a rough manner, such as running, jumping, or jumping from high places. Excessive force can cause the smartphone to fall.