The Kershaw Baby Boa is a very nice knife. Steel used to be 440A, but recently changed to 13C26. You might find some older stock at stores of the 440A, so you would probably want to ask. But Kershaw's 440A is quite good and the Baby Boa has a lot of belly for great slicing in such a small knife.
If you don't mind something that's wider and fits the hand quite well while still being very short, the Boker Subcom and its variants (various colors, blade shapes, etc.) are amazing knives!