This document presents the 12-item Grit Scale used to assess an individual's grit or perseverance and passion for long-term goals. The scale consists of 12 statements where respondents indicate how much each statement is like them using a 5-point scale. Six items are scored such that higher numbers indicate more grit while the other six are reverse scored. Scores are averaged, with higher scores indicating greater grit ranging from 1 (not at all gritty) to 5 (extremely gritty). The scale was developed to provide a concise yet reliable measure of individual differences in grit.