Bought on AliExpress. The band contains no information whatsoever besides cleaning instructions (handwash only, dry flat, no dry cleaning, iron on low heat). Weight in grams is taken off the listing but no meterage is indicated. Yarn weight is either lace or cobweb, going strictly visually.

The listing called this “100% silk cotton” though it also said it’s mixed yarn. Another listing for the same product describes it as 100% acrylic. It does have a recycled symbol and is listed as organic, so it may be recycled cotton.