badge-a-minit's professional buttons makers are superior to tecre, in my opinion. we tried out tecre's button maker, and my hubby broke it on the first try. sure, the button maker we have was more expensive, but it's also faster than the tecre, you could kill an elephant with it, and makes perfect buttons every time. and the best thing is that it's so sturdy, the hubby can't break it.
YMMV if you don't have a hubby that has <0 dexterity and the sensitivity of a retarded, blind elephant.
we use 2.25" because our designs tend to be larger, with more text.