They look like Tahitians in the 8-10 mm size range. I don't see any pearls that I would call pistachio in the strand, but I don't think the colors is showing very true. I am seeing a lot of chocolate on one side, but then throughout the strand it appears to be mixed colors.
Thank you, Jeremy! You called the size range almost exactly (9.02-10.62 according to vendor). This image was a capture from the vendor so I'm not sure of it's representation of the true colors. When they arrive, I'll try my hand at capturing accurate images. Thanks again!