In the Sonic Boom series, Tails is generally considered to be around 11 years old. This is based on a theory that adds about 2.5 to 3 years to his usual age of 8 in the main Sonic series, reflecting the slightly older characterization in Sonic Boom
. Officially, Tails is 8 years old in the core Sonic the Hedgehog series according to Sega Japan's profile and Sonic Channel
. However, Sonic Boom portrays the characters as a bit older, with Tails at about 11 years old to fit the tone and character dynamics of the show
