Lace weight yarn
Lace yarn is very thin and great for extra floaty shawls. It has a knit gauge of 32-34 stitches over 4 inches [10cm]. (8 to 8.5 stitches per inch)
There isn't a wpi listed for lace yarn because you don't want to count that. (If it's smaller than fingering weight yarn than it's lace weight.)
