Set of 7 aluminum foil cores. These are hard cores. Length: Approximately 25.8 cm Diameter (Outer): Approximately 2.9 cm Diameter (Inner): Approximately 2.6 cm Please note that these measurements are approximate and may have slight variations due to manual measurement. Due to the size, the cores will be wrapped in a plastic bag and placed in a brown envelope for shipping via Yu-Packet Post, without any cushioning material. [Other] All cores have adhesive residue from the aluminum foil (see photos). Please refrain from purchasing if you are seeking perfection, are concerned about minor details, or are overly sensitive.