I make rolls too as a change from a loaf.
When you take out your dough put it on a lightly floured board and divide it into pieces, just by pulling pieces off the lump. As purplemonkey says you dont need to be precise. form into rolls about the size of snooker balls.
Put them on a greased baking tray, cover with a tea towel and put them somewhere warm to rise.
This usually takes 30 minutes.
Then bake in a hot oven I think its about 200 in my fan electric oven for about 10 minutes.
I like it when they semi join together and you have to pull them apart.