This is a small-lot set of 12 thermal paper roll cores (for receipts) and 3 bonus short receipt cores. Many other listings offer large quantities, so this is for those who want a smaller amount. Thermal Paper Roll Cores: Length: Approximately 9.8cm Width: Approximately 3.3cm Receipt Cores: Length: Approximately 5.4cm Width: Approximately 3cm For those who enjoy crafts and DIY projects. Great for children too! If there's good feedback, there will be irregular listings in the future.