Supplies

350-1000 meters of cotton DK weight yarn (2 hanks of Petalouda Super 10 #3606)
4 mm crochet hook
An embroidery needle to sew in the ends, stitch markers or safety pins
5 wooden buttons (15 mm) - for sizes XS/S, M and L; 6 buttons for XL/2XL, 7 buttons for 3XL/4XL.
Stitch markers or safety pins (5 pcs)

The gauge is 10x10 cm 19 chains x 10 rows of back loop double crochet .

This pattern is written using US terms

The top is worked flat in one piece + the straps.

Sizes: XS/S, M, L, XL, 2XL, 3XL, 4XL

The sizing information

S - 60 cm wide (open) and 25 cm long (without straps)
M - 65 cm wide and 26 cm long (from the top of the cups)
L - 69 cm wide and 27 cm long (from the top of the cups)
XL - 77 cm wide and 30 cm long (from the top of the cups)
2XL - 85 cm wide and 33 cm long (from the top of the cups)
3XL - 93 cm wide and 36 cm long (from the top of the cups)
4XL - 101 cm wide and 39 cm long (from the top of the cups)

The length and width can be modified according to your personal preferences - you can chain more (to make it longer) or work additional hdc bl rows (to make it a looser fit). In order to keep the same proportions as in the reference images please follow the instruction below.