UK / US crochet term:

Chain stitch – ch

Double crochet / Single crochet – dc / sc

Treble / Double crochet – tr / dc

Shell – work 3 tr/dc + 2 ch + 3 tr/dc in the same space.

Make 14 foundation chains.

Row 1: work shell (3 tr/dc + 2 ch + 3 tr/dc) in fourth ch from hook, 2 ch, shell in last foundation ch, turn.

Row 2: 4 ch, shell in shell below, 2 ch, shell in the same shell below, 2 ch, shell in next shell below, turn.

Row 3: 4 ch, shell in shell, 2 ch, shell in shell, shell in space of 2 ch (between 2 shells), shell in shell, turn.

Row 4: 4 ch, 3 shells in 3 shells bellow, 2 ch, shell in shell, turn.

Row 5: 4 ch, shell in shell, 2 ch, shell in shell, 1 ch, shell in shell, 1ch, shell in shell, turn.

Row 6: 4 ch, shell in shell, 3 ch, 7 tr/dc in next shell, 3 ch, shell in shell, 2 ch, shell in shell, turn.

Row 7: 4 ch, shell in shell, 2 ch, shell in shell, 2 ch, 3 tr/dc in the same shell, 3 ch, 7 tr/dc with 1 ch between in each tr/dc below, 3 ch, shell in shell, turn.

Row 8: 4 ch, shell in shell, 3 ch, 6 dc/sc with 5 ch between in each space of 1 ch, 3 ch, shell in first space of 2 ch, 5 ch, shell in next space of 2 ch, 2 ch, shell in shell, turn.

Row 9: 4 ch, shell in shell, 2 ch, shell in shell, shell in space of 5 ch, shell in shell, 3 ch, 5 dc/sc with 5 ch between in each space of 5 ch, 3 ch, shell in shell, turn.

Row 10: 4 ch, shell in shell, 3 ch, 4 dc/sc with 5 ch between in each space of 5 ch, 3 ch, 3 shells in 3 shells bellow, 2 ch, shell in shell, turn.

Row 11: 4 ch, shell in shell, 2 ch, shell in shell, 1 ch, shell in shell, 1ch, shell in shell, 3 ch, 3 dc/sc with 5 ch between in each space of 5 ch, 3 ch, shell in shell, turn.

Row 12: 4 ch, shell in shell, 3 ch, 2 dc/sc with 5 ch between in each space of 5 ch, 3 ch, shell in shell, 3 ch, 7 tr/dc in next shell, 3 ch, shell in shell, 2 ch, shell in shell, turn.

Row 13: 4 ch, shell in shell, 2 ch, shell in shell, 2 ch, 3 tr/dc in the same shell, 3 ch, 7 tr/dc with 1 ch between in each tr/dc below, 3 ch, shell in shell, 3 ch, 1 dc/sc in space of 5 ch, 3 ch, shell in shell, turn.

Row 14: 4 ch, 3 tr/dc in shell, shell in next shell, 3 ch, 6 dc/sc with 5 ch between in each space of 1 ch, 3 ch, shell in first space of 2 ch, 5 ch, shell in next space of 2 ch, 2 ch, shell in shell, turn.

Repeat rows 9 - 14 until you have reached your desired length.