Thanks everyone! I knew that if I had been eyeing it for a year, it was a good idea to jump when the offer was made (I had tried it on a bunch of times in the interim).
It's 48 inches long. The large WSS, GSS and Tahitian pearls are around 14mm. The smallest Tahitians are around 9mm, and the 'average' size Tahitians that make up the bulk of the strand are between 11-12 mm. So it's quite a bit more substantial than my silver rope (which is also something that I wear constantly). I do have to admit to having a bit of neck soreness though after wearing it for a full day of work. It's clearly hitting my limit for weight (either that or I'll have to start doing exercises to make my neck stronger).