Saw 1.5 ounces on a label. That equals 42 grams.
States 3-ply on the label.

Knitting gauge 20 stitches X 20 rows = 4 inches
Crochet gauge 4.5 sc per inch. Hook size F

Machine wash warm, always tumble dry.

This is a very light weight yarn - inexpensive: $.79 per skein in the ’80s. Slightly fuzzy & glittery.