What once looked like this thermal shirt above, now looks like this:
I saved the sleeves I cut off.... placed them together...... cut a J-shaped wedge out of the top of each sleeve......sewed the sleeves together.....rolled the top down to make an elastic casing.....and sewed the buttoned placket down to make the baby pants appear to be buttoned....then added the elastic in the waistband.
You can do this with your old sweaters or old shirts (men's or women's), creating an upcycled garment that's just perfect for your new baby! My baby pants fit my son from 2-5 months. I just love them, and Daddy thought I was pretty creative : ).