Relationship quality is a central theme in business to business relationships, and it is becoming increasingly important from a theoretical as well as practical perspective to understand and monitor relationship quality. Despite its pivotal role, measurement issues of relationship quality have not been systematically investigated, confounded by a lack of consensus on the dimensions and contents of this construct. This paper presents a comprehensive review on the measures of relationship quality, and proposes the CLOSES scale as a new monitoring tool. This higher order, multidimensional scale reflects the intensity of communication (C), long-term orientation (LO), and social and economic satisfaction (SES) of a focal actor in a business relationship. Tested with data collected from 404 construction companies and cross-checked with a second round of data collection from 201 companies in other various industries, using partially multiple respondents, this new scaleshows good reliability, convergent, discriminant, and nomological validity, as well as cross-industry transferability. Thus, future academic research as well as practical management of business relationships is enriched by providing a valid and reliable tool that is not tied to a specific industry setting, to capture the important construct of relationship quality.