Either method works but the diagonal is the more traditional/accepted method. I will admit I've done it both ways. I used to think the diagonal was harder and took longer but once I started doing it I discovered it was just as easy. Diagonal does make for flatter seams and they say it's stronger as well. Really though, non-quilters will never notice. It's up to you.

Kate

I've done it both ways, too. Something to consider is the fabric....solid or print? A print usually doesn't show a straight seam but I like to use diagonal with solid...not that I always do....depends on how much fabric I have. Not much help, eh?

SharonG/FL

I think the diagonal seam is less noticeable. Of course, if the border is a stripe or directional fabric, you want to take extra care that everything matches up just so.

Teresa

I think it depends on the width of the border. A diagonal seam on a wide border is going to be longer than a straight seam.

Good point! On stripes I use a straight cut not a diagonal.

I base it on width, too. If the border is over 3" wide I use a straight seam, usually diagonal for narrower ones.

Donna