Here's another vintage sheet apron that was an experiment. I rounded the bottom edge of my usual chef's apron pattern and added a ruffle. I think I cut off a little too much when I rounded it, but otherwise it's a cute effect with minimal effort.
A little tip: I've found that it's much easier to line aprons than use bias tape on the edges or try to fold the edges to the back and sew them that way. I'm getting a little better at bias tape, though, so I may not do this forever.