Hello one 'n all

I guess my gut feeling it really doesn't matter, but I thought I would ask anyway.
My next the Puffer that I hope I can 3D print, looking at my test sample, it looks a tad on the small side, lack volume, I really want a gutsier model, I'm thinking about printing at 125 -130 % and form previous experience someone is sure to ask, " What's the scale " Col