40 cardboard roll cores. Length: approximately 5.7cm, Diameter: approximately 1.8cm, Hole diameter: approximately 1.1cm *Please understand that these measurements are approximate. These are roll cores made of a hard paper material. They are about 3mm thick and won't crush even if you press on them. Both the surface and the inside are smooth and clean, making them easy to work with. Great for children's crafts and art projects＼(^o^)／ If you have any questions, I can provide additional photos, so please feel free to ask. Please understand that these items have been stored at home before purchasing. There are no pets or smokers. For those who don't mind the condition shown in the photos, this is a great deal. Please consider purchasing. m(_ _)m #PaperTube #PaperCore #RollCore #Crafts