It is a 4 row repeat so you can scale this shawl up or down.

Special stitches used--
Cluster - 4 DC worked into the same space/stitch
Beg Cluster -Chain 4 ( counts as first DC and chain 1), dc 4 into first ch space, sc into middle of cluster below ----All rows after row 2 will start this way.
End Cluster- sc in middle of last cluster, (cluster, ch 1, dc) in last ch sp ---- All rows after row 2 will end this way.