White Cotton Dress ---a bodice pattern that fits around the bust

Bodice part---McCall's 5927

Skirt part--- McCall’s 4460 (discontinued)

When I try on something in a clothing store, I often find that many dresses in my size gape around front armholes---hence, showing my bra---not so attractive!

If the item fits you everywhere else, gaping in front armholes most likely means that it is not big enough around your bust.

Then, upon reading a book about fitting (Fit for Real People by Pati Palmer and Marta Alto) , I learned that commercial clothing and sewing patterns are designed to fit B cup size bras.  I don't know if it makes sense in the modern world where women's average bra size is a lot bigger... (source: USA today)    

You could have your clothes altered(tailored)----but making it BIGGER in the particular area (or any areas for that matter) is...kind of difficult to do after the fact.

So....LET'S MAKE CLOTHES THAT FITS YOU TO BEGIN WITH!!

You could do full-bust adjustment to patterns, but lately, major commercial pattern companies are making some patterns with different bra cup size options.  Just pick the pattern size according to your upper bust measurement, and then choose your bra size (Because if you use your full bust measurement AND your bra size which is bigger than B, it would be too big)

Happy Sewing!