In this chapter, measurement issues are addressed concerning Aaron Antonovsky’s original sense of coherence (SOC) questionnaires of 29 items and of 13 items, as well as several modified translations applicable to the individual, the family, the organization, and the community levels. Validity (face, construct, consensual, criterion, predictive) and reliability issues (test–retest, internal consistency) of the scales are discussed. Criticism of the original scales is deliberated.