Twin Size Beds This simple, yet practical, 39-inch Step One twin platform bed is a great value for your money as it does not require a box spring. In addition, the decorative legs will give your bedroom a stylish touch. It can be combined with all of South Shore's collections available in the matching finish. Available in Pure White and Pure Black finishes. Designed to support a maximum weight of 250 pounds. Constructed of recycled laminated particle panels.