Video tutorial
S Size
Chain 90
Row 1: Start with chain 1, 28 single crochet, 28 half double crochet, 34 double crochet
Row 2: chain 3, 34 double crochet, 28 half double crochet, 28 single crochet
Repeat rows 1 and 2 to have 33cm of width in the part of the waist
Sew the first and the last row together leaving a space to sew the buttons
Make some chains on the other side of the buttons for buttoning
M Size
Chain 100
Row 1: Start with chain 1, 32 single crochet, 32 half double crochet, 36 double crochet
Row 2: chain 3, 36 double crochet, 32 half double crochet, 32 single crochet
Repeat rows 1 and 2 to have 36cm of width in the part of the waist
Sew the first and the last row together leaving a space to sew the buttons
Make some chains on the other side of the buttons for buttoning
L Size
Chain 110
Row 1: Start with chain 1, 35 single crochet, 35 half double crochet, 40 double crochet
Row 2: chain 3, 40 double crochet, 35 half double crochet, 35 single crochet
Repeat rows 1 and 2 to have 39cm of width in the part of the waist
Sew the first and the last row together leaving a space to sew the buttons
Make some chains on the other side of the buttons for buttoning
XL Size
Chain 120
Row 1: Start with chain 1, 38 single crochet, 38 half double crochet, 44 double crochet
Row 2: chain 3, 44 double crochet, 38 half double crochet, 38 single crochet
Repeat rows 1 and 2 to have 44cm of width in the part of the waist
Sew the first and the last row together leaving a space to sew the buttons
Make some chains on the other side of the buttons for buttoning