High resolution magnetic Barkhausen noise (MBN) measurements were performed on cracks that were present in a section of 390 mm diameter and 29 mm thick steel pipe. The MBN indicators considered were the MBN energy signal, the number of events, and the variation of pulse height distributions (PHD) in the crack vicinity. Results were compared with magnetic particle inspection and ultrasonic depth sizing methods. A sensitivity to crack depth was observed; deeper cracks and/or portions of cracks generating a greater reduction in the MBN energy signal. Variations in the number of events and a narrowing of the PHD in the crack vicinity were also observed. Results were attributed to the generation of nonuniform magnetization in the crack vicinity due to modified eddy current field interactions with the crack as well as reduced magnetic coupling across the crack.