This is a very simple crochet pattern I designed for a hoody.  I am not a  skilled artisan. I made this one in double crochet, but any stitch will do.  It consists of  a series of rectangles.  Simply decide what measurements you need. It is easy to find size measurements online.  I’ve done several in child to adult sizes.  The back is largest.  The two front sections are slightly more than half the back size.  Once you have back, front sections and sleeve rectangles made to measure. Slip stitch or crochet front sections to back.  I leave a generous neck opening.  Lay it out flat and stitch sleeves to sweaters, taking care that sleeve centers match shoulder seams.    Finally stitch up side sleeves and down length of sleeve.  To make good, crochet along neckline, repeating till desired hood depth is attained.  If you just want a collar, make it desired size.   Pull hood edges togetherinches, child hoods about six.  Once complete, I crocheted  several rounds completely around sweater and hood.  Finally, attach buttons or zipper for closure.  If desired, run a crocheted drawstring around outer edge of hung.   I love making this simple hoody.  It works up very quickly, especially in a bulky yarn.