I almost have to customize the doll clothes, because of waist measurements, length, dress style needs, etc. I always let the child name the doll.
Sometimes ladies give away clothes made of decent fabric, large enough to cut the seams from, and that is what I will be looking for. Something that will 'wear well' for the dolls.
Hubby let me order an inexpensive singer heavy duty machine for my upcoming birthday, so now if I want to use denim for a different look, I can turn to old jeans and do so. Maybe now I can make boy dolls with a face on each side...turn the doll around for a sleepy look or a smile instead of flipping it. Lots of possibilitys. An old sweater can be cut up for the top and the 'blue jeans' are easy. Sweater cuffs can also make the boy doll a beanie cap. Hope this is not clear as mud. I did make one boy doll about 12 inches high some time back.