The Death’s Head Moth Cocoon is a loose fitting oversized garment
The sizes is determined by the hook size
Small /Medium G (4.25 mm) Finished Measurements 52 inches at bust 28 inches long
Large/ XL I hook (5.50 mm) Finished Measurements 56 inches at bust 32 inches long
2X/3X K hook (6.50mm) Finished measurements 60 inches at bust 36 inches long

Written in American Crochet terms. Pictures of almost every step