I forgot - there are places online where you can "try on frames" - which is great. I picked the style and shape I wanted at one of those, then ordered them from Zenni Optical. You upload a picture of yourself without glasses, and it plunks the frames on so you can see what you'll look like! I no longer have it bookmarked, but it was pretty easy to find.

Way easier than dragging someone with you to the store, then having to trust them with how you're gonna look!