Polyester Adjustable & Elastic: Our bed sheet clips adjustable range from 6.3 inches to 12 inches (16cm to 31cm), with an impressive maximum stretch length of 26.8 inches (68cm). The wide elastic bands are built to handle strong tension, this sheet holders keep sheets firm & tight and neat, fit to your crib, twin, full, queen, king size mattress cover. Say goodbye to those annoyingly untidy or wrinkled sheets once and for all Premium Materials: Sopito fitted sheet straps are made of the finest quality polyester bungee band, durable plastic buckle, and heavy duty metal clips, will not fall apart or break easily. Latex in clips can avoide damage fabric. We’re strictly tested to make sure each bed sheet holder in a good working condition Practical Fitted Sheet Clips: These versatile straps are a must-have for wrinkled sheet. They come in handy for securing flat or fitted bed sheets, as well as other covers, including hospital bed sheets, sofa cushions, mattresses, tablecloth covers, chair, boat, car, and motorcycle seat covers, ironing board covers, tablecloths, slipcovers, and more. However that the bed sheet holders cannot be used on thick fabrics such as blankets. Simple Operation: Installing and removing our bedsheet clips/straps is a breeze, taking only a few quick steps. The sturdy metal clips bite into the edges and corners of your sheets, ensuring a tight and secure grip that keep sheets in place firmly. No more worries about pesky sheet sliding during your cleaning routine Hassle-free Service: We offer outstanding service to you. Our premium bed sheet holders for corners are backed by a 3-month warranty. You can contact us anytime if you have any quality problems