I've thought about making patterns for different clothing items before, but didn't know where to start. Maybe you have had some of the same thoughts. I've found a few links to help you in your attempt to make a pattern.
Check out these tips on making a pattern at Cat On A Limb. She walks you through making a pattern for the cute shrug in the top picture.
If you want a VERY thorough and professional explaination and descriptions of how to make patterns (maybe if you plan on selling some), you will definitely want to read this three part series from The Scientific Seamstress (on Sew, Mama, Sew! ) She is incredibly helpful!!!
Article 1 - Pattern Drafting and Grading
(Found via UCreate).