So today i’ve got a few diagrams to share with you explaining it! Ready?
I’m pretty sure our first inclination is always to slash and spread a pattern to lengthen it – that works well for fairly close fitted garments – but becomes a bit problematic when fullness is involved. For circular based designs it alters the pattern shape and therefore the drape too drastically. To try and get something more accurate you may end up trying to work multiple slash lines at different angles, and lets be honest, that’s getting a little confusing and still difficult to implement.
Here’s what i recommend you do- and conveniently it’s the simplest method! – lengthen the side seams and inseams by the same amount, then redraw the hemline to be parallel to the original. This is best since it maintains the circle, and the drape of the culottes won’t be altered at all.
Let me know if you have any more questions about it!!