Results of an experimental investigation to determine the influence of specimen size, fiber type, and fiber content on the flexural behavior of steel fiber-reinforced concrete are presented. Two fiber types and four mixes are investigated. With four series in each mix, there are sixteen series. The effect of the two cross-sectional sizes of 150 x 150 mm and 100 x 100 mm (6 in. x 6 in. and 4 in. x 4 in.) on flexural strength is also studied. Hardened concrete is tested for pulse velocity and flexure. For each series, two specimens are tested for monotonic, and one specimen for cyclic, loading. Loading and unloading rates were the same for both monotonic and cyclic loading. In addition to the load deflection measurements, the crack mouth opening displacements versus load are recorded in the case of notched specimens. Load deformation behavior, post crack load drop phenomenon, and toughness for two types of fibers are evaluated and compared. There is evidence of scatter of results related to the difficulty in achieving a uniform distribution of randomly oriented fibers. The flexural toughness factor, recommended by the Japan Society of Civil Engineers, is calculated. A comparison of load deflection curves under monotonic and cyclic loading indicates that the fibers primarily influence the envelope curve and that cyclic loading does not have any appreciable influence on the energy absorption characteristics. The load versus crack mouth opening displacement behavior is similar to the load deflection curve for notched specimens.