This garment is one size but, because the knit is very stretchable and flexible, it really can suit a wide size-range of women.
They can be gently hand-washed or washed in a washing machine as long as they are protected from snags by a mesh lingerie bag. Do not machine dry---reshape while damp and dry flat.
These shawls are handmade in Bali on knitting machines operated by hand. Having visited the factory where these garments are made, I was impressed by the clean, comfortable environment and efficient, smiling workers. For example, the women who inspect and package each shawl sit around a well-lit table and chat and giggle all day long as they work.