The Panda Cable Stoppers is a very cute and practical. HiyaHiya's Panda Cable Stoppers screw onto HiyaHiya Interchangeable Cables and Straight Needles ends, perfect for securing your knitting on your cable as needed.
They are sold as a pair and available in small size:
Small fits small cables for needle sizes 2.75mm - 5mm.
Large fits large cables for needle sizes 5.5mm