White rotary foot
 

Any suggestion for a foot for white rotary treadle that edge of foot is quarter inch? It seems they all are to narrow to use edge as seam guide.

Why don't you just use a seam guide? I always use a seam guide as I've never found a 1/4" foot that I liked.

Cari

How about marking the foot with a fine line black marker, then using a file or pick to etch the line or lines?

If your machine has a short shank your could go to a quilt shop or Joanns and get a 1/4" foot, should fit. I have 3, but I like the one with a guide attached best.

I use a painter' tape strip, I also frequently change the strip, but my Viking 6430 has a great foot that enables to get a 1/4" seam without using the tape.