Janome Front-Load - 1/4 inch Seam Foot Janome 1/4 Inch Foot "O" (front loading machines) A popular foot with patchworkers for that essential 1/4 inch seam. The guide on the foot enables you to sew a perfect 1/4 inch seam every time. The guide can also be used wherever a 1/4 inch seam is called for but the markings on the needle plate cannot be used, such as when completing a flat-felled seam.