A lot of this depends on how you are fishing and what size of water.
I prefer a torpedo shaped float, with a rounded top and an elongated point/bottom all with a smooth taper. I find this style to be the best all-purpose shape.
Size depends (to me) on how much weight you need to throw. If I am fishing strictly jigs I usually use a 3/8 or 1/2 oz rated float (25gr if metrically inclined). When fishing larger rivers or for fishing bait to chinooks I'll step it up to a 3/4 or 1oz rated float.
There are lots of other threads on this this topic if you do a search, you'll probably come up with many more opinions.
Welcome to the Notebook!
and Good Luck!
