Same nose but everything smaller? (photo)

Yes that is very possible and realistic.  If your occasionally thinking about it then I would recommend not doing surgery; you should only move forward with surgery if you are constantly thinking about it.

An experienced Board Certified Plastic Surgeon can bring about a wonderful sculpting of the nose reducing many aspects that are disproportionate.   It would not be a safe assumption though to say that any surgeon can take any particular nose to  keep every thing the same but just smaller.  

It's very important that you have an in person consultation and the opportunity to express exactly what your hopes and desires are in order to obtain a realistic idea of what can be brought about.  

There are many factors beyond just the appearance of your nose, but the inside structure and the thickness of your skin that the surgeon takes into consideration.

I hope you find this information helpful.