Let your yarn do all the hard work for you!. This adorable pattern for baby/toddler jacket and trousers uses Hayfield's self-patterning yarn Baby Blossom Chunky. Pattern includes instructions for hooded jacket and trousers. Sizes range from 0-6 months to 1-2 years. The Jacket uses 2-3 balls of yarn while the trousers use 2 balls of yarn (depending on size) and the pattern calls for US9 and US10.5 needles.