Here2Learn ~
Write down this URL:
http://www.womensholsters.com
It's the website for Cunningham Custom Leather, and it has absolutely the
best articles I've ever seen online about how to choose a holster to fit a woman's body. While the articles are written with the idea of selling a holster to the reader, the information in them is clear, accurate, and well-presented -- and will be useful no matter which holster-maker she eventually decides upon.
If yesterday's customer doesn't need the info, tomorrow's customer probably will.
As for the rest, I can only echo what everyone else has already said: shoulder holsters are great for people who aren't well-endowed. They simply don't work well for people who are. (If she's really adamant about wanting a shoulder holster, you might want to steer her towards a vertical rather than horizontal design, as the vertical ones conceal a bit more easily. Also, be sure to show her how to draw without crossing her own brachial artery, by raising the left arm
well out of the way while drawing.)
For hiking, she may want to consider a fanny pack. I very vaguely remember someone on THR posting about a fanny pack holster designed to be clipped to the belt of an ordinary backpack ... anyone? anyone? ...
Hope some of that helps.
pax
Nearly every woman I've interviewed says finding a suitable holster falls somewhere between challenging and impossible. -- Gila Hayes