From Scroop Patterns:
The Mahina Cardigan combines simple geometric shapes, a unique customizable fit system, and thoughtful shaping to create a versatile draping cardigan that can be elegant enough to wear as a wrap to a wedding, or casual enough for weekend errands.
Choose from four base shapes (View A Small Circle, View B Medium Circle, Veiw C Large Circle, and View D Oval), and match them to sleeve patterns based on your bicep measurements, and shaping darts customised to your shoulder width.
Pick between cuff bands or hemmed sleeves, and then select one of four edge finish options (raw, bound, faced or lace-edged), and wear your cardigan loose, or pinned closed with a brooch, for almost limitless fit and finish options.
Biceps: 10"-18 1/2" 26cm-48.5cm
Shoulders: 12 1/2"-19.5" 32-49.5cm