I use these (scroll down to "ultra bibs with sleeves") for dd1. They are brilliant - contain spills, easily washable/dryable and most importantly have sleeves (she is great at wafting her sleeves over her plate!)
They are now getting a little small for her and I can't find any in the next size up (medium child size!) which have sleeves - any ideas? Dd1 has mostly wet meals (ie stuff in sauces) as she refuses to drink, so sleeve-less bibs would mean multiple changes of clothes per day...