FULL is HUGE- This bed would be nice if it actually fit my bed. I bought a full-size and there is no way this frame or the headboard are a full. I even ordered to replacement thinking they sent the wrong size, but no.. ￼we did a little experiment and put a queen size mattress on it l, and it fit just perfectly. We really only ordered this because he likes the headboard but it too wide to attach to his current frame. 
Not sure how they come up with the dimensions on this, but the Full size does NOT fit on this frame. My son has of platform bed, and if you can see from the pictures, we put his frame inside of this product and you can clearly see the difference. Buying a box spring wouldn’t matter Because this product is about six or 7 inches longer than the mattress it falls through the end. Also- this is cheap, and flimsy I cannot believe how much this cost, oh, and Wayfair wants to charge me to send them back.  neither one ￼