gilet au crochet n°10 Size 10mm crochet hook, rectangle for back, two rectangles for front, two more for sleeves. All double crochet stitches. Maybe FP / BP double crochet for collar edge, trim, and cuffs. Day or 2 project...hmmm?
Relax-and-Unwind Sweater Free Crochet Pattern in Red Heart Yarns -- This crochet sweater gives you a roomy, relaxed attitude while looking great! Lower border detail adds just the right finish with easy cluster stitches. Lightweight yarn can be worn with a tank in warmer weather or a turtleneck in cooler weather. Pattern is given for sizes X-Small to 3X.
The "Simply Elegant" Sweater pattern by Jenny King