1.5" x 1.5" x 2mm Glow-in-the-dark stars! Black rubber pin clutch. One of the hardest signs to get to know is that cancer possesses a hard outer shell but a soft vulnerable interior like its ruling crab. They are quite mysterious at first, but once they open up, they are extremely loyal and nurturing to their loved ones. Cancers seek to create homes that are safe and secure, and this love for security allows them to care for others with deep compassion and loyalty.