Length: Adjustable from 11.8" to 47" (30cm to 120cm), providing great flexibility and meeting various needs of families. Protection: The closure is constructed of system plastic, which does not harm the fabric; metal clasps provide a secure grip. Sturdy and durable: The fasteners are made of sturdy and heavy metal clips with elastic tensioners, which will firmly hold your bed sheets and won't break easily, ensuring long-lasting use. Multi-Function: Adjustable professional design to fit all types of sheets, including hospital beds, air beds, adjustable beds, water beds, futons, RVs, and hide-a-beds. Easily tie: The bed sheet ties are very easy to use thanks to their human-centered design. You can easily attach them to your bed sheets in seconds without any tools, keeping corners securely in place. Product Information: Size: M-8Pcs | Color: Black | Package dimensions: 17.6 x 12 x 4 cm; 173 grams | Item weight: 173g. These sheet clips will firmly hold your bed sheetsnever worry about loose or wrinkled sheets again. Integrated plastic stretcher system helps protect the fabric. Suitable for fitted sheets or flat sheets on various types of beds such as standard size beds, irregular shaped beds, foam beds, pillow top mattresses, air mattresses, RV beds, and travel trailers. Other uses: Tablecloths, grill covers, car seat covers, boat seat covers, motorcycle seat covers, scooter sofa seat covers, chair covers, fitted sheets, mattresses, and ironing board blankets.