My own design - here's the pattern!
6 skeins Bernat Denimstyle (or any worsted weight yarn)
J crochet hook
Gauge is not important - this could be made with chunky weight & a much larger needle if desired. The neckline would just be a bit larger.
Row 1: Ch 80, join to form ring - being careful not to twist chain.
Row 2: Ch 3, dc in each ch around, join in top of beg. Ch 3. 80 dcs.
Row 3: Ch 1, sc in same st, *Ch 3, skip 1 dc, sc in next dc,* repeat from * to * around. Join with sl st in 1st sc.
Row 4 & 5: Sl st in 1st chain loop, (ch 3, sc in next loop) around, join with sl st in 1st sc.
Row 6: Sl st in 1st ch loop, ch 3 (counts as 1st dc), (2 dc, ch 3, 3 dc) in same loop (beg shell made),*(ch 3, sc in next loop) 9 times, ch 3 (3 dc, ch 3, 3 dc) in next loop (shell made)*, repeat from * to * twice; (ch 3, sc in next loop) 9 times, ch 3, join with sl st at top of beg ch 3.
Row 7: (PATTERN ROW 1) Sl st to first ch 3 space, ch 6, dc in same space, *(ch 3, sc in next loop) across to next shell, ch 3, (dc, ch 3, dc) in shell,* repeat from * to * around, join with sl st in 3rd ch of beg ch 6.
Row 8: (PATTERN ROW 2) Sl st in 1st ch3 loop, beg shell in loop, *(ch , sc in next loop) across to next corner loop, shell in corner loop*, repeat from * to * around, ending with sl st. in top of beg ch 3.
Repeat pattern rows 1 & 2 until poncho is length desired, ending with pattern row 1.
Border: Shell in corner space, ch 3, *3 dc in each space to next corner, ch 3, shell, ch 3* repeat from * to * around. Join, fasten off, weave in ends.
I’m 6’ tall and my poncho ended up 22” from neckline to straight edge, 36” from neckline to points. However, the mesh stretches so these measurements are estimates