These are the cardboard cores from things like plastic wrap. 30.7cm, diameter 3cm: 19 pieces 30.7cm, diameter 2.7cm: 5 pieces 22.5cm, diameter 3cm: 13 pieces 23cm, diameter 3cm: 1 piece 23.2cm, diameter 3.3cm: 1 piece 22.5cm, diameter 3.8cm: 1 piece (from a kitchen towel roll, soft type) There may be slight variations in length and thickness, but there are a total of 40 pieces. Most of them are hard cores, except for one. Most are from plastic wrap, but there may be a few other types mixed in. Would you like them for crafting? Please consider this, understanding that they are stored at home. * Two cores have stains. I tried to wipe them, but they didn't come off. * No cancellations or returns. Thank you.