Yarn: 2 strands of size 1/superfine/fingering cotton (50 g = 170 m) OR 1 strand of size 2/sport.
Hooks: 4 mm (for body) and 10 mm (for sleeves)
For the body you make double crochet, alternating between front and back loop (instead of hdc)
When making the panel you are skipping the turtleneck part, and therefore only working with your bust measurements.
You will need to subtract 10 cm from measurement 4 & don’t add anything to measurement 5.
After making the first panel you make 2 back panels.
Each back panel needs to be 1/7 of the front panel. Measure the front panel width and divide with 7, to get the width of each back panel.
Connect the back and front over the shoulder (the full width of each back panel) as well as each side.
Back straps: insert your 4 mm hook on the first back panel, around where the armpit is (or try on the top and pinch where you want the strap to be – I like mine just under the bust). Make 1 ss, ch 2, 1 dc in the same stitch, 1 dc in the next two, ch 2 and turn. Crochet 1 dc in each stitch (through both loops), crochet back and forth until your strap is long enough to be tied on the back. Mine measured 42 cm.
Make the sleeves as described in the pattern (using the 10 mm hook).
Now only sew the sleeve on over half of the armhole – the bottom side, so that the top of the sleeve is open. You can of course also sew the sleeve on all the way around.