They average about 20 members each. Most of the ecclesias meet in each other's homes or in rented halls. A few own their own buildings. They have no central organizations. Each ecclesia is autonomous.
Coordination is largely through publishing houses.
Their leaders are called lecturing brethren, managing brethren and presiding brethren. All are male volunteers who are elected to their posts. Women are given equal voting rights. Members do not vote, run for office or go to war. A small minority of Christadelphians discouraged fellowship with Christians from other denominations.