X-Metal Size comparison: Penny, Juliet, XMXX, XS, R1

[supersharp]

A key difference between Juliet and XS is the length of the earstems. Juliet earstems are much longer, wrap around the sides of your head. The shorter XS earstems grip you more centrally; some find this annoying while it doesn't bother others.

Here's a comparison pic I took a while back showing the difference in length.