Part 1
To make the blouse, crochet two squares. Begin crocheting each square with one shell, and then gradually add more shells. Make a foundation of 7 chs to crochet the first shell.

First shell
1st row – h6ch, [trc1, (ch1, trc1) x 3] into 1ch + RC1
2nd row – h2ch, sc9 + RC5
3rd row – h7ch, trc1, (ch1, trc1) x 7 + RC2
4th row – [dc1 under ch, dc1] to end

Add shells
5th row - h6ch, [trc1, (ch1, trc1) x 3] into 1ch, ch1, sk4, sl.st.1, (ch3, sk2, sl.st.1) x 2, ch1, sk4, trc1, (ch1, trc1) x 4] into 1ch + RC1
6th row – h2ch, sc9, ch1, sl.st.1 under arch of 3chs, ch3, sl.st.1 under arch of 3chs, sc1 above 1st trc of previous row (2nd shell), sc8 + RC5
7th row - h7ch, trc1, (ch1, trc1) x 7, ch1, sl.st.1 under arch of 3chs, ch1, trc1 above 1st trc of one row before previous row (2nd shell), [ch1, trc] x 8 + RC2
8th row - [dc1 under ch, dc1] x 7, dc1 under ch, dc dec1 to end, dc15 + RC5
Repeat the pattern starting from the row 5 adding more shells.

Part 2
After you crochet 10 shells or the length of one side will be about half of your chest circumference, begin gradually decreasing the number of shells.

Decrease
1st row – h2ch, sl.st.1, (ch1, sk1, sl.st.1) x 2, [(ch3, sk2, sl.st.1) x 2, ch1, sk4, (trc1, ch1) x 5, sk4, sl.st.1] to end; ch3, sk2, sl.st.1, ch1, sk2, dc1
2nd row – [ch3, sl.st.1 under arch of 3chs, ch1, sc9 above 5trcs, ch1, sl.st.1 under arch of 3chs] to end; ch1, dc1 into 2nd/middle chain of last arch of 3chs
3rd row – [ch1, (trc1, ch1) x 9 above sc9 of prev.row, sl.st.1 under arch of 3chs] to end; trc1 into last chain of 1st decrease row + RC1
4th row – ch1, dc17, [dc dec1, dc 15] to end; unfinished dc1 above last trc, unfinished trc1 under arch of 3chs, then draw yarn through all 3 loops on your hook.
5th row = 1st row
6th row = 2nd row
7th row - [ch1, (trc1, ch1) x 9 above sc9 of prev.row, sl.st.1 under arch of 3chs] to end; trc1 into next chain of 1st decrease row + RC1
Repeat the pattern starting from the 4th row until you have one last shell.

Last shell
1st row = 1st row (decrease)
2nd row = 2nd row (decrease)
3rd row - [ch1, (trc1, ch1) x 3, trc3, ch1, (trc1, ch1) x 3, sl.st.1 under arch of 3chs, trc1 into next chain of 1st decrease row
4th row – sl.st.1, (ch1, sk1, sc1) x 2, sc1, hdc1, dc dec above 3 middle trcs

Top part
After you crochet one square, ch3 to pick up the height and work triple crochets to end of one side + RC1.

First shoulder part
1st row – h2ch, sc3, hdc3, dc3, trc2, trc dec1 + RC3
2nd row – h5ch, trc2, dc3, hdc3, sc2, sl.st.1

Second shoulder part
Attach the yarn 12 chs before the end of the trc row. Make 2chs to pick up the height.
1st row – trc3, dc3, hdc3, sc3 + RC1
2nd row – h2ch, sl.st.1, sc2, hdc3, dc3, trc3
Join shoulder parts on the wrong side of the garment. Continue working the pattern joining two shoulder parts together.

Neckline
Work dc round decreasing 4 chs in each corner. Then work sc round decreasing chs in each corner.

Bottom edge
Work trc round, dc round, and sc round.

Sleeves
Work sc round around each sleeve.