QUOTE(Nicia-Clarinet-Flute @ Mar 22 2009, 11:59 AM)

What size would I need? I'm only 5'2" and small built, would I even beable to handle a Viola?
As others have said, yes, you'd be able to handle a viola just fine. To see whether a particular size would suit you, hold the viola in the playing position and gently grasp the scroll of the instrument. If you can do this comfortably - with a slightly bent arm and without stretching - you'll be able to handle an instrument of that size.
QUOTE(Nicia-Clarinet-Flute @ Mar 22 2009, 11:59 AM)

Lessons - would 1 hour per fortnight be enough for me?
I'd say that's plenty to start with, although I'd be inclined to split it and have half an hour once a week at this early stage of learning. Obviously you'd probably find it physically hard work to have an hour-long lesson when you're not used to the instrument; also it is important to get your technique correct from the start and frequent lessons are a good way to do that. Have fun, it's a fabby, fabby instrument. Oh and you may find there's some overlap between your clari repertoire and viola....