The identification of fracture toughness in fiber-reinforced concrete (FRC) has become increasingly crucial due to its significant impact on construction practices and material performance. Crack Mouth Opening Displacement (CMOD) measurement is a key method for assessing fracture behavior in FRC. Although numerous studies have been conducted, variations in CMOD measurement techniques and their effects on different types of fibers remain insufficiently explored, particularly in the context of testing using notched beam specimens. The study presents a comprehensive review of CMOD measurement technique, focusing on the three-point bending test using notched beam specimens. The review analyzes and compares finding from various research, examining variations in beam specimen dimensions and fiber reinforcement types. By synthesizing these studies, we evaluate the influence of different beam dimensions on CMOD measurement outcomes and explore the effects of various fiber reinforcements. This integrated approach provides valuable insights into the challenges and accuracy of CMOD measurement across diverse experimental setups, contributing to a deeper understanding of fracture behavior in FRC. The findings of this review aim to enhance material performance assessment and inform future applications in the construction industry, while also highlighting emerging research in this critical area of study.