Initially numbering around 32,000, SFOR was downsized over time to about 7,000 troops as of early December 2004, when the mission to implement the military aspects passed to a European Union-led force, EUFOR.
U početku je SFOR imao 32 hiljade vojnika, da bi vremenom ta brojka bila smanjena na oko sedam hiljada početkom decembra 2004, kada su misiju sprovođenja vojnih aspekata sporazuma preuzele snage Evropske Unije, EUFOR.