I am aware that the medieval period is long and there may have been differences amongst countries. I don't know how much I must specify my question. So, if necessary to choose a time and place, please focus on England, 1300-1400AD.
I read on Wikipedia for this period:
The basic garments for women consisted of the smock, hose, kirtle, gown, surcoat, girdle, cape, hood, and bonnet.[4]
Unfortunately, I have only found medieval examples for the kirtles, but they seem fairly complex. I am aware, that the examples from paintings might represent the most elaborate garments:
Still, I wonder, how much of the attire women were able to fashion by themselves, given the cloth.
When I was little we lived in the Greek mountains and most women had sewing skills, but I think for something like the kirtle above they generally went to the seamstress.
Edit:
It turns out the kirtle image is from 1626, so even that is not medieval, but Renaissance clothing (many thanks to the commentator Mr Denis de Bernardy). I will try to find a more accurate one. Until then, I think, it may serve as an estimate for the level of sophistication.