Abstract. Research has shown that ideal romantic standards predict future partner characteristics and influence existing relationships, but how standards develop and change among single individuals has yet to be explored. Guided by the Ideal Standards Model (ISM), the present study sought to determine whether repeated experiences of romantic rejection and acceptance over time were associated with change in ideal standards, ideal flexibility, and self-perceived mate value (N = 208). Results suggest repeated experiences of rejection correspond to decreases in ideal standards and self-perceived mate value and increases in ideal flexibility, though no effects emerged for acceptance. Given the predictive nature of ideal standards and the link rejection has with such, findings from this study contribute to a greater understanding of relationship formation processes.