How to Get Subtle and Effective WIDER Nose?

Without seeing photographs of you, or examining you in person, I am taking on face value that you desire a subtle widening of the bridge and radix. 

If that's the case, then almost certainly fillers are the answer. There are two reasons for this:  Hyaluronic acid fillers are cheap, controllable, reversible and subtle.  They will let you experience and work toward the result you are trying to achieve, and withour risk, a recovery time or anaesthesia. In the nose, the filler lasts a long time - often 2 - 3 years, in our experience.

Depending upon how much you need, the cost would be ( in Australia) around $750 - $1500.

    Filler to widen the nose may be reasonable, but a rhinoplasty with grafting to that area could be considered as well.  One would need an exam and a discussion of the positives and negatives of each.  The filler will be less expensive but temporary.  Starting with the filler to assess response and then moving to a rhinoplasty later is not a bad idea either.  Kenneth Hughes, MD Los Angeles, CA

If you are looking for a subtle increase in upper nasal bony width, you may consider fat injections which can be be performed intranasally. This can be 'tested' by temporary hyaluronic-acid based fillers first. It can also be widened by cartilage or dermal onlay grafts but this would be more invasive and the magnitude of the problem may not justify this amount of effort.