I am considering breast augmentation but do not want to look too large or have them be cumbersome. What size should I consider?

I am a 41 year old who has breast fed two children.  I run 5 days a week, golf and am very active.  I had a consultation and am looking at a subpectoral, saline breast augmentation.  I have been looking at 225cc saline but my husband thinks I ought to go bigger.