Key Takeaways On her wedding day, Princess Diana wore low heels in an effort not to appear taller than Prince Charles. Over the course of her marriage, Diana continued to only wear low heels to reportedly protect Charles's ego. The gown Princess Diana wore to tie the knot with Prince Charles is one of the most world's most well-known wedding dresses. Tim Graham / Contributor / Getty ImagesWhy Princess Diana Never Wore High Heels During Her Marriage to Prince CharlesThe principle Diana applied to her wedding shoes continued for the duration of her marriage to Charles. "For years, Diana wore shoes no higher than two inches out of respect to her husband's ego," Eloise Moran wrote in "The Lady Di Look Book," according to Insider.