These are the cores that bolts of fabric were wrapped around. - Colors: Beige, White, Brown - Quantity: 8 - Diameter: Approximately 2cm, 3.2cm - Length: Approximately 37cm (about the same width as the fabric) - Uses: Fabric storage, DIY, crafts There is some variation in thickness and length. One is particularly thick (see image). They are reasonably sturdy, but will be crushed if an adult steps on them. Thank you for looking.