tool size

Hello, I'm looking to buy a roughing gouge and a skew. I turn solely pens. What size do you think will suite pen turning best? The 1/2" (12.7mm) or the larger 3/4" (19mm)? Thanks.

Hi, folks. First post. Hope it's in the right place!! I've recently inherited a Prazimat DLZ 180x450. It seems to be a spectacularly good lathe for a hobby-ist. I've just spent a few weeks cleaning it up and appears to be in very good condition. I'm determined to learn how to use it...