I found this thread helpful, and particularly post #2 by Jim Kitchen. http://www.largeformatphotography.in...ad.php?t=64909

I just order a frame for a 14x17 enlargement based very closely on Jim"s template. I used the one with 1/2" borders between the photograph and the mat and made the signature space 3/4" instead of 1". The frame came out to 21 3/4" x 24" for landscape oriented image. I ordered the frame along with some others from FDI. This will be my second order from FDI for custom frames. I was very pleased with my first order btw.

Personally I'm much happier with custom sized frames. Most of my images just don't quite fit standard frame sizes.

Roger