Size is approx. 57.0 by 3.0 by 1cmAdditional product info; This neck strap comes with a length-adjustable slider part that allows 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 skin issues, stop using it immediately and consult a doctor.- Do not give it to infants or toddlers. There is a risk of choking if swallowed or of strangulation with the strap cord.- Do not wrap the strap cord around fingers or any part of the body, as it may cut off circulation and is dangerous.- Avoid rough usage such as running, jumping, or jumping from high places while a smartphone is attached to this product. Excessive force can cause the smartphone to fall.