From the BMFA web page:
Gaea is a 4-ply yarn made from 21.5 micron Certified Organic Merino from Argentina. It’s combed in Germany and spun in the U.S., both mills certified organic. I love the whole world aspect of this yarn. It has a lovely hand. It’s as much of a dream to dye as it is to knit.
All measurements are approximate.
Content: 100% Certified Organic 21.5 Micron Merino
Weight: 8 oz / 226 g
Length: 740 yds / 676 m
Gauge: 20 - 22 stitches per 4 inches (10cm) on size 6 -7 (4 mm - 4.5 mm) needles