This is a great exercise for warm-ups, shoulder mobility and stability, and for hypertrophy. I would suggest using the same grip width as you use on your bench press, but it will depend on your range of motion.
Elbows should be beneath the wrists in the front and back position. Press the bar up just high enough to clear your head, rotating from front to back.
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Sumo or conventional? Check out these tips for choosing the best style for your body type.
Calves won't grow? You're probably going too fast. Hold the bottom position for around 5 seconds and the top for 3.
If you want to do enough volume for muscle growth, but only have a short amount of time to train, organize your training split like this.
This off-season program typically puts 20 pounds of muscle on athletes. Sound good? Check it out.