she is not from the U.S. and uses metric measurments-
the patterns (if you are using one of her patterns they are paper piecing-and the papers are in the package---you sew on the line- you can (measure) the lines to see exactly what it is if you feel the need- i've made a couple of her patterns- but have not bothered to measure the lines i just sew on the lines i'm supposed to sew on....but it is very close to a 1/4" --might be scant, like i said i haven't measured it-but looking at it-it looks pretty (standard)