Soldering iron tip size for through hole components
I would say that 2mm is probably a little on the large side but a lot if it is down to personal opinion.

However there are some important things to consider when choosing the tip size.


How much heat will the component need to solder to the board, a smaller tip will not be able to heat large areas of metal as effectively
What size area will you be soldering. In your case 2.54mm between pads is plenty of space for a large tip.


I generally find the standard tip most irons come with okay for pretty much anything.