Size is approx. 57.0 by 2.0 by 1cmAdditional product info: This is a neck strap equipped with a length adjustment slider part, allowing you to adjust to your preferred length, and a safety part that separates the strap when strong force is applied.- The recommended age for this product is 15 years and older. Do not give to infants or young children. There is a risk of choking hazards and strangulation with the strap.- Do not wrap the strap around fingers or any part of the body, as it may cut off circulation and pose a danger.- Do not use this product in a rough manner, such as running, jumping, or jumping from high places with a smartphone attached. Excessive force may cause the smartphone to fall.