Determining a kitten's age can be tricky! Typically, the size and development of their teeth are good indicators. For example, kittens with baby teeth usually range from 2-8 weeks old, while permanent teeth appear around 4 months. Kitten weight can also provide clues, as they gain about a pound each month up to 6 months. Have you found a kitten, or are you thinking of adopting one? I'd love to hear more about your situation!