While it's our firm belief that 'naughty' is a relative term, we will always jump at the chance to finagle our way to the top of Santa's list (just in case.)  Helping the cause this year, a single strand of large ceramic rounds in the jolly man's favorite shade of red are all that's needed to create a fabulously festive look.  A vintage goldtone hook and chain clasp (by Napier) is the only adornment needed, which allows for a length range of 18.5 to 20" overall.  So charming, you'll surely be able to cancel out any lapses in style judgement just in time for Christmas.