Ch 5, dc in 1st ch (this forms a "point")
Row 1: ch3, turn, dc, ch1, dc in the point.
Row 2: ch3, turn, (dc, ch1, dc) in ch1 sp, ch1, (dc, ch1, dc) in next ch1 sp
Row 3: ch3, turn, (dc, ch1, dc) in ch 1 sp, *ch1, dc in next ch1 sp; rep from * to end to last ch1 sp, (dc, ch1, dc) in last ch1 sp
Rep row 3 until desired size.
Without cutting the yarn, work the edging along the 2 sides of the shawl.
Row 1: ch1, turn, sc along edges. (3 sts per dc, and 9sc in the beginning point)
Row 2: ch5, turn, sc in 3rd sc, *ch 5, sk 2 sc, sc in next sc; rep from * across to point, (only sk 1 sc, ch5, sc in next sc) three times, then continue with * to end across to end of row
Row 3: ch5, turn, sc in 1st ch5 sp, *ch 1, (dc, ch1) 6 times in next ch5 loop, sc in next ch5 loop, ch5, sc in next ch5 loop; rep from * to end until end of row
Row 4: ch1, turn, sc in 1st ch 5 loop, *ch2, (dc, ch2) in each of the 6 dc from previous row, sc in ch5 loop; rep from * to end until end of row
Row 5: ch1, turn, sc in 1st ch2 sp, *(sc, ch 3 sc ) in each of the 5 ch2 sps, sc in each of next 2 ch2 sps; rep from * to end of row
Fasten off, and weave in any remaining ends.
You may have to mess around with the edging, depending on how many rows you have. Just do whatever looks right at the point!
The ruffled edging adds about 3" to the sides of the scarf. Total, the shawl is about 30" from the top to the bottom point, and 65" along the top edge.