Spring guide edge foot available in 1/8, 3/16 and 1/4inch both left and right sided.Available from ebay.

Ok I found some....now some opinions maybe on what size everyone prefers. I see 1/8, 3/16 and 1/4. I’m nit sure if that means 1/8 on reach side of the seam or if that’s total width of the French stitch

I've got all six and I can find uses for all of them.At the moment I making tool pockets the 3/16 makes a nice seam around the edges, for french seams I mainly use the 1/8, if I'm running twin lines on a face panel the 1/4 is a good subsitute for a twin needle machine.
The number is the distance between needle and edge, although an 1/8 should give you a 1/4 french seam its a bit bigger, maybe 3/8.

Ok so what’s everyone suggest for seats then. The 1/4?

i use 1/4 this is the outcome

check this out ........... 3 sizes left and right https://www.ebay.co.uk/itm/S585R-1-8-3-16-1-4-3set-S585L-1-8-3-16-1-4-3-sets-S32-3-16-1-4-5-16-3-8-4-set/272815314608?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

I use 3/16 on almost all seat seams (most modern cars use this), 1/4 for carpet binding, 1/8 for matching seams in older cars (about 50 yrs or so and older). I also have an 1/8 on the machine that I use solely for perimeter stitching piecesbto sew foam

Andrew Bodnar —

I see your machine is a Mitsubishi. does it use consew style feet or are they both round attachments? If so have you found a place that has feet for a reasonable price? here is what my feet look like