★This bed is "customer assembled furniture"★ For "customer-assembled furniture," we ask that customers unpack, assemble, and install the product themselves. Mattress size can be changed freely Since the mattress is simply placed on the frame, you can change the size of the mattress to suit your lifestyle and aesthetic preferences. Even if you decide to sleep with someone else, you can continue to use the bed for a long time without having to buy a new frame. Pattern 01: Wide stage layout: The frame extends 20cm beyond the mattress. The frame can be used as a side table. Pattern 02: Narrow stage layout: The frame extends 10cm beyond the mattress. For those who want to casually enjoy stage design. Pattern 03: Full layout: If you lay out the mattress to fill the frame, two people can sleep comfortably.