This definitey happened to me at 16.5 inches! I got it in early-April and liked the length but once I wore it for an entire day, it got so short it was choking me, so I sent it back to be extended two inches in the middle of April. (I also bought a sweet alhambra turquoise butterfly for my sister at the same time and we sent hers back the same day.) But I have had the strangest experience, you guys, and am getting a little nervous! My whole transaction was was via phone and text to VCA South Coast Plaza. The SA I bought both pieces f from "left the company" between our receiving them and our sending them in. A different SA took over for me when I repeatedly tried to contact original SA. She sent my sister and me FedEx labels to ship the pendants to her. There were no RMA type things to attach, I questioned that, she said it was fine, not to worry, that they would receive it. Now more than a month has gone by and I know this is not normal as I have had things sent to NYC for stone replacement that have taken less time than that, so a few days ago I texted SA #2 to check up, but the text went from blue (iPhone) which was our normal to green. Thinking this is her work phone and she was off, I decided to text again today, same thing, green. So I called the boutique and was told that SA#2 does not work there anymore either and that they would try to locate my pendants and get back to me. WTF??????????