Yes, like suzeeq says, I've seen many patterns starting generally with a CO 3 st, and increasing 1 st just
at the beginning of each row. If it helps, here's one that I found with the increase as a YO:
Using 9 mm needles, CO 3 st.
R2: K1, YO, knit to end.
Repeat R2 until piece measures 35" from cast on edge = 143 st. Bind off loosely.
Finishing: Cut yarn for fringe 16" long and add in spaces along side edges of shawl.