Monica Vinader Siren Medium Pendant Charm. 1.3 cm long x 1.2 cm wide (about 1/2”). You can’t find this piece on MV website or Nordstrom anymore. Worn a couple of times, so it’s in excellent condition. Has been stored in Monica Vinader anti tarnish pouch so it’s still very shiny. I included a screenshot of proof of purchase but also to better illustrate the shade of blue. iPhone pics don’t always capture the color.