Part 1
Begin crocheting from the bottom to top.
Make a foundation chain of 180 chains or multiples of 18 chains.
To add one repeat under each arm, make a foundation chains of 216 chs.
Join it into a ring with a slip stitch.

1st round – ch2, sc to end plus sl.st.1 under 2chs

2nd round – ch3, dc7, sk2, trc1, ch1, sk1 back, trc1, ch1, sk1, sc1, ch1, sk3, trc1, ch1, sk1 back, trc1, [dc9, sk2, trc1, ch1, sk1 back, trc1, ch1, sk1, sc1, ch1, sk3, trc1, ch1, sk1 back, trc1] to end; dc1 + sl.st.1 under 3chs

3rd round – ch2, sc10, ch3, sk3, [sc15, ch3, sk3] to end; sc4 + sl.st.1 under 2chs

Repeat the pattern starting from the 2nd round until you crochet to your under arms.

Part 2

Repeat the two-round pattern until you crochet to your underarms.
Crochet your last round as your second round.

Front part
Begin working rows instead of rounds.
Turn your work to the wrong side.
1st row (wrong side) – h2ch, sc4, ch1, sk3, [sc15, ch3, sk3] x 3, sc15, ch1, sk3, sc4 +RC1

2nd row (right side) – h3ch, dc16, [sk2, trc1, ch1, sk1 back, trc1, ch1, sk1, sc1, ch1, sk3, trc1, ch1, sk1 back, trc1, dc9] x 3, dc6, dc dec1

3rd row – h2ch, sc18, [ch3, sk3, sc15] x 3, sc3 + RC1

4th row – h3ch, dc14, [sk2, trc1, ch1, sk1 back, trc1, ch1, sk1, sc1, ch1, sk3, trc1, ch1, sk1 back, trc1, dc9] x 3, dc4, dc dec1

5th row – h2ch, sc16, [ch3, sk3, sc15] x 3, sc1 + RC1

6th row – h3ch, dc12, [sk2, trc1, ch1, sk1 back, trc1, ch1, sk1, sc1, ch1, sk3, trc1, ch1, sk1 back, trc1, dc9] x 3, dc2, dc dec1

7th row – h2ch, sc14, [ch3, sk3, sc15] x 2, ch3, sk3, sc14 + RC1

8th row – h3ch, dc10, [sk2, trc1, ch1, sk1 back, trc1, ch1, sk1, sc1, ch1, sk3, trc1, ch1, sk1 back, trc1, dc9] x 3, dc dec1

9th row – h2ch, sc12, [ch3, sk3, sc15] x 2, ch3, sk3, sc12 + RC2

10th row – h4ch, dc8, [sk2, trc1, ch1, sk1 back, trc1, ch1, sk1, sc1, ch1, sk3, trc1, ch1, sk1 back, trc1, dc9] x 3 + RC1

11, 13 rows = 9th row
12, 14 rows = 10th row

Front shoulder parts
Use 10 chains
15th row – h2ch, sc10 + RC2
16th row – h4ch, dc9 + RC1
17, 19, 21 = 15th row
18, 20 = 16th row

Back part
Skip one repeat from the front part, attach the yarn into the last triple crochet chain on the wrong side of the garment. Chain one to pick up the height.
1st row – sc12, [ch3, sk3, sc15] x 2, ch3, sk3, sc11, sc dec + RC2
2nd row = 10th row (front part)
3rd row = 11th row (front part)
Alternate the 2nd and 3rd rows until you crochet 18 rows.

Back shoulder part
Work the back shoulder part totally the same as the front shoulder part.

Join back and front shoulder parts together on the wrong side of the garment working double crochet row.

Part 3

Neckline
1st round - sc110* + sl.st.1 under 1st two chs
*110 single crochets or multiples of 11 chs.

2nd round – ch3, dc1, sk2, trc1, ch1, sk1 back, trc1, ch1, sk1, sc1, ch1, sk3, trc1, ch1, sk1 back, trc1, [dc2, sk2, trc1, ch1, sk1 back, trc1, ch1, sk1, sc1, ch1, sk3, trc1, ch1, sk1 back, trc1] to end + sl.st.1 under 3chs

3rd round – ch2, sc4, ch3, sk3, [sc8, ch3, sk3] to end; sc3 + sl.st.1 under 2chs

Repeat the pattern starting from the 2nd round using a smaller size crochet hook.