Colorful silicone pop-it Multiplication Table Quick Reference Chart Thank you for viewing. This is a used item. The ball chain is not included, but the holes are not damaged, so it can also be used as a keychain. It helped me memorize quickly, and it was a good product. Size: 20cm x 20cm. There might be some dust in the gaps of the pop-it, but I will disinfect it with alcohol and blow it with a compressor, and ship it in a clean condition. Please purchase only if you understand.