Features: Advanced Bed Sheet Holders - Upgraded Straps Fit All Mattress Sizes, Keep Sheets Tight and Secure. Easy to Install & Remove: Features a buckle-fastened design—simply insert and lock. Suitable for all ages to handle independently. Fits All Sizes: Works with other mattress and sheet sizes. Secures sheets firmly at the corners. Improves Sleep & Comfort: Holds sheets firmly in place, eliminating daily remaking. Enhances rest quality and convenience. Sheet-Safe Construction: Updated structure without clips helps avoid damage to sheets, supporting long-term use. Specifications: Dimensions: As shown in the picture Package Includes: Invisible Sheet and Pillowcase Fasteners ×4 note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.