The length is adjustable, with great flexibility to meet the needs of the family.After expansion (2M Protection: will not damage the fabric, the metal buckle ensures a firm grip. Robust: The closure is made of sturdy metal clip, can firmly secure your sheets and it is not easy to break, it can be used for a long time. Multi-function: Professional adjustable design, suitable for all kinds of bed sheets, hospital bed, inflatable bed, adjustable bed, water bed, bedding. Solid Tie: The single bed is very easy to use. No tools are required, check if the corner is in place. Material: Metal + Nylon Song Tight Belt Size: width 2.5cm, long 20-55cm Note: for the hand to measure, there are 1-3cm errors, please understand. Color: White Quantity: 8