The size of the tips have nothing to do with the kind metal you are
using. The diameter of the tips are all about the amount of volume of
heat you generate.
I use most often a #1 for just about everything, as it is the size
constraint of the metal and the mass, not just gold or silver. The
00 and the 0 are hard to light as the amount of gas is very meager.
They are good for a tiny solder operation such as joining a jump
ring. If you are soldering something larger, than a 0 is a weak
I would suggest a 0, 1 and 2. With those three tips, you can do
Safety tip! There are two inner rubber rings attached to each tip.
Make sure they are both tight and secure. Over time, these rubber
o-rings, will deteriorate. Order some extra from Smith or a welding
supply company. Those tiny o-rings is what creates the vacuum seal
allowing the air to travel into the tiny holes and mix with your
acetylene fuel. Push the tip all the way down onto the hand piece and
then screw the seal closed.
Search out soldering tips in the Orchid Archives. There are some
good hints in there.