Breast cancer is the most frequently diagnosed cancer in women worldwide and decision-making regarding treatment options can be complex; however, patients often desire to be involved in health-related decisions. There has been a growing body of research into decision-support tools such as decision aids (DAs). Generally, DAs outperform standard care over a range of decision-making outcomes and there are some that have been developed for use with breast cancer patients across the treatment trajectory, which have been evaluated for use in practice. There is scope for developing additional DAs for cancer patients, however, there are some limitations and barriers that need to be overcome as part of the implementation process. Consideration for the mechanisms for maintaining relevancy of materials and ease of accessibility is also needed.