Indeed, and Roman Catholics, Eastern Orthodox, Anglicans, Lutherans, Calvinists and Oriental Orthodox are the 1st, 2nd, 3rd, 4th, 5th and 7th largest denominational groupings, with approximately 1 billion, 250 million, 140 million, 100 million, 80 million, and 60 million members.
The Methodist family (including the UMC, GMC, Nazarene, Free Methodist, British Methodist, and historically Methodist parishes of the United Church of Canada and the Uniting Church in Australia, and the historically black Methodist churches such as the African Methodist Episcopal and AME Zion churches, and also various Wesleyan and Wesleyan Holiness churches) are not far behind, but I hesitate to provide an exact size, as the data is unreliable due to the alienated former membership of the UMC being in flux, with many having become Orthodox or members of other traditional liturgical churches, including more traditional Methodist churches, including our friend
@jas3 who became Eastern Orthodox, and several of my relatives who are still discerning where to go.