If you can't craft an oversized headboard yourself, you can shop for a king headboard that has large proportions and mount it to the wall. For a look similar to the bold style French and French ...

The Lilyana Tufted Upholstered Headboard & Bed is on sale now for about 20% to 25% off every size, with the twin size starting at $264.99 and the king headboard and bed available just under $550 ...