"When we age, the collagen and elastin fibers that make up cartilage begin to break down. This causes them to stretch and sag, making them appear longer. Our skin giving structural support to cartilage, also contains collagen and elastin fibers that droop over time. This compounds the lengthening problem.
Drooping isn’t the only cause to the appearance of larger ears and noses. The surrounding areas of the face, like your cheeks and lips, lose volume over time. The result is the appearance of larger organs next to them.
All of this drooping and stretching does cause our ears and noses to lengthen. Studies have shown that ears elongate by .22 millimeters per year. This elongation-to-age ratio is so exacting, it can be used by forensic scientists to determine the approximate age of a person."
From
http://themedicinejournal.com/articles/do-your-ears-and-nose-continue-to-grow-as-you-age/