You could follow this tutorial, but make the wood the size that you need. https://www.hometalk.com/2613857/diy-headboard-for-under-30
Hi there, this one could be customized to fit any size. https://www.hometalk.com/44248099/easy-diy-farmhouse-king-headboard
Hi! Simply change any measurement for the width of your bed!
We went straight to the wall instead of head boards for 3 out of our 6 beds. One has a large framed mirror mounted directly over the bed at a height where it doesn't interfere with the bed, bottom is about 5' off the floor. One has a large grapevine wreath with cotton blooms in the center of the bed and wooden cathedral frames on each side of the wreath. The 3rd has a large metal heart mounted on the wall that is scroll cut. I have a small metal plate with Ariel "make a splash" on 1 side and Belle "follow your heart" on the other for the 3yo's room.
Here's some more. Just adjust the measurements
Hi, here is one that I made. You would just need to adjust the length of the boards. Have fun! http://www.recreateddesigns.com/2015/12/diy-wooden-headboard/
You are most welcome! It was really easy to make (and I only needed a drill). You can paint it any colour you want too so it's easy to personalize it. Have fun!