Personalised Halloween Trick or Treat Bag - Ideal for Tiny Treats and Treasures, for this Spooky Halloween. Could also be a practical sandwich carrier, be a little different the week of the Halloween. 100% cotton goody bag measures 21cm wide by 26cm high, exact dimensions may vary slightly from size stated. Cotton products are 100% biodegradable and completely compostable. It takes approximately a year from the sowing of a cotton seed into the earth to the production of a finished cotton bag. A natural cotton bag will provide roughly twelve years of continuous use. When it has fulfilled its purpose, it can be shredded and placed in a domestic composting bin or taken to an industrial composting facility where it will provide the necessary carbon elements to the compost mixture.