Loved the thought of these... I had a very hard time finding the right ear sizing but at least there were a number of options. (amazon.com)
Jaybird RUN comes with a selection of interchangeable tips and fins for different ear sizes, so you're sure to get the perfect secure and comfortable fit. (ecoustics.com)
After accounting for natural variations in ear size and things like earring wearing (earrings tend to lengthen the lobe but don't change the ear's overall growth rate), the doctors found that ears grow about.0087 inch a year, or about half an inch over 50 years. (discovermagazine.com)