Akatsuki, at any given point in time, is composed of no more than ten primary members. There is no known criterion required for joining the organization, though all known members have severed all ties with the village they grew up in and are S- class criminals, the most wanted and dangerous individuals,
Akatsuki is a widespread organization, with its members constantly traveling between countries and its agents operating out of various villages throughout the world. These agents work for specific members for varying purposes; Sasori has a number of agents under a form of mind control that he uses as spies, while Kakuzu has a group of people that take care of his finances. Because the various members are often so far apart, making a meeting in person impractical, they can communicate through a form of telepathy. If there is a need for the group to have more of an interaction with each other, members can use a form of astral projection to meet at one of Akatsuki's many secret lairs. When their entire group meets like this at the end of the first part of the series, one member notes that it had been seven years since they had all been together in such a fashion. Their meetings are much more frequent in the second part of the series due to their increased activity.
Akatsuki members dress in similar clothing: a long, dark cloak bearing red clouds and a red interior with a chin-high collar Each Akatsuki member wears a single, unique ring, and no two members wear a ring on the same finger. In total, there are ten rings, and each seems to have some special significance; Tobi believes that he can become a member after finding Sasori's ring, and although Zetsu claims it's not as easy as that, Tobi does indeed become a member. Deidara reinforces the significance of the rings when, after losing both his arms, he expresses more concern for finding the ring than finding the arm itself. Likewise, when Orochimaru leaves the organization he takes his ring with him, and in the ten years since then he has yet to be replaced. Each ring bears a unique symbol.
pics of akatsuki

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