I knitted a lovely yellow cardi and hat and mittens - which ds did wear, including on way home from hospital .
Sybil - hats too big???? I don't think so! We always have to buy at least one size bigger, and have problems with some jumpers and tshirts as the neck is narrow (I wish you could still get envelope tops to fit - makes getting on easier)
Having April baby, we did need jackets/ cardis etc, but vests and sleepsuits most required items. I was remarkably good and only bought essentials (vest and sleepsuits) and knitted one jacket and relied on hand-me downs (some never used) and gifts. About the only significant purchase I made early on was shorts dungarees and matching shirt to wear once he'd had his Christening robe taken off (before it got too dirty).
Have you shopaholics checked out the 'babybanz' site? You'll go weak at the knees! We made lots of heads turn going round in buggy at under 1 with snazzy sunglasses on!