Typically, I just freehand my faux stitching lines using the smallest point of my marker or a white gel pen. For those who want little neater finish, a perfect guide is Stampin' Up!'s mat pack that you normally use for paper piercing. The edge has guide marks for an easy wide or small faux stitch.
Here's another version of the card with the wide stitch:
No need for a sewing machine or stamps to get a neat faux stitch look.
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Ingredients: Stamps: Cheep Talk by SU!
DSP: Basic Grey
Ink: Old Olive, Riding Hood Red by SU!; Ruby Red Marker; light green from Primary Colors fluid chalk by Color Box
Cardstock: Spring Moss by PTI