This universal bed guard is designed to fit securely on twin, double, full, queen, and king size mattresses. With this 60" long bed rail, you don't have to worry about your child rolling out of the bed. The skin-friendly oxford cloth cover with soft PP cotton filling ensures comfort and security. Besides, you can always keep an eye on your baby through the mesh. The fold-down feature makes it convenient for both parents and toddlers to access the bed, while the adjustable safety strap ensures a secure fit. Warm tips about how to buy a bed rail: buy 1 piece for 0-3 months ; buy 2 pieces for 3-6 months (crawl and turnover); buy 3 pieces for over 6 months (learn to stand and walk); buy 2 pieces for over 3 years .