I thought I could post my underwear sewing pattern here, I drew it in seamly2d, it's my first sewing pattern, and I was going to share it with like a copy left licence, but it just occurred to me that it would pinpoint my sex, so when I draw the underwear for the other sex, and parametrise a couple stuff I will post it then. I still don't know how to make it printable in seamly2D but when exporting the drawings without going through the layout stage as is to svg, and doing the layouts in svg in inkscape and print the svg directly it retains the sizes very very good, if I can parametrise stuff from inkscape maybe I will post the sewing pattern that way.