More to explore:
Copy Cat a favorite garment
make a pattern from your favorite garments
Copy Your Favorite Tee
Copying Complex Garments
An easy way to copy your favourite clothes/ copy patterns from existing garments
Patternmaking - Copy a favorite blouse
How to put a garment together.
Cuff. You could extend the concept to make a matching collar.
how to copy industrial sewing methods-Copying processes #3
Make a pattern from your favorite pants