Grumpy_Mike:
That is way big. I go for the smallest you can get, normally 0.8mm or smaller.
OK, OK, I was talking through my hat and guesstimated wrong. I was browsing at work, away from my "hobby" workpile.
The two gauges I have are actually 0.75 and 1.1 mm, and the finer is preferred.
Grabbed a spool of real leaded solder at a garage sale a few weeks back. That will keep me going.