A twin XL bed frame is designed to fit twin extra-long mattresses. Both twin XL and regular twin mattresses have a width of 38 inches, but a twin XL has a length of 80 inches, which is 5 inches ...

It can also be found at Connox or Manufactum. Above: The Ikea Utåker Stackable Twin Beds in pine are sold with two bed frames; $407 at Ikea. Above: The Zeitraum Guest Stacking Bed by Hertel ...