This is a swatch-as-you-go top-down crocheted pull-over sweater.
You can hook with any yarn and any hook size.
After you have started the yoke, you will measure gauge and enter values into a chart.
You do need to take or select the measurements you want to use.
There are some calculations to be done, but each step is laid out, formulas given, and examples too.
Ideal for plus sizes!
Specific instructions for each size are NOT given as the choice of yarn and varied measurements for bust, sleeve circumference, sleeve length and body length are left up to the crocheter.