Originally Posted by
Scissor Queen
If you're doing mitered corners it can work to sew them together first. If you're not doing mitered corners it looks odd to sew them together first.
Ditto this. If you sew them together first and don't miter them they look really different. I wish I could tell you what it looks like, but it is a visual thing. If you are not mitering them, sew them on one at a time.