I'm selling these at a bargain price because I no longer use them. 1. Round core 1.8mm, weight 14mg 2. Round core 1.6mm, weight 8mg 3. Round core 2.2mm, weight 28mg 4. Round core 2.2mm, weight 68mg \*Please note that there may be some error due to amateur measurement. \*Overall, they are in good condition, but there may be minor scratches or stains, which is why I've priced them as such. \*The top two (green-toned) items in the first photo have some discoloration, so I'm offering them at a lower price. Thin craft material made of natural materials - Color: Green, light green mix - Material: Natural materials, bamboo, rattan - Quantity: Multiple rolls - Uses: Handicrafts, crafts, knitting Thank you for looking.