Based on research with eight to eleven-year-old girls from the South of England, I discuss the relationship between their clothes, identity, temporality, life course and the ageing process. Despite media accounts suggesting the passivity of pre-teen girls’ fashionable dress consumption, unknowingly becoming prematurely sexualised through hyper-feminine dress, by using the interlinking of materiality and life course as a lens to explore girls’ understanding of fashion, my research showed that girls engage with popular debates about age-appropriate dress. I demonstrate that the participants were aware of sexual generationing and explored older, hyper-feminine, sexualised identities at specific, socially-approved times. Most significantly, this materiality/life course approach offers new insights into how girls explore the past, present and the future, feeling the passing of time and the ageing process on their bodies, through the materiality of their clothes. It is through dress that girls come to understand age, temporality and where they are on their life course.