This 1/4" clear acrylic 5" wide long arm ruler comes in 2 handy sizes of 15" or 18" lengths.
Fits 1/2" (0.50 mm) hopping foot. A custom 0.53 mm hopping foot can be ordered.
Handy reference lines in the centre, every 1/4", 45° and 60° and on left and right edges.
I designed this ruler to assist me when stitching straight lines from corner to corner on both horizontal and "on point" blocks in one smooth motion with better accuracy and without re-lining up a shorter ruler multiple times.
The side edge opening allows the hopping foot to stay in place for easier stitching from start to the stop stitching points with less "unstitching" results.