Clothing fit assessment based on standardized body measurements for women in their 30s

Women’s body shapes often undergo significant transformations in their 30s due to factors such as aging and childbirth. However, clothing manufacturers continue to rely on a body type that corresponds to standard A in the national sizing system to set clothing sizes, making it increasingly challenging for women in this age group to find well-fitting garments. Most existing body shape and clothing-fit research encompasses broad age ranges; limited studies specifically target women in their 30s. This study investigates the fit of standard Chinese medium-sized (M-sized) clothing for women in China aged 30–39 who wear M-sized tops. Findings revealed substantial alterations in the participants’ body characteristics compared with the standard M-size: participants exhibited significantly larger waistlines and increased abdominal and hip circumferences. Following the national standard for body type classification, which is based on the bust-to-waist difference, the majority of the sample population leans toward the national standard's B body type. Virtual try-on simulations demonstrated that existing garments aligned with the standard body type but do not provide an optimal fit for women with these altered proportions. Results underscore the necessity to reassess current sizing standards to accommodate evolving body shapes. This study serves as a scientific foundation for apparel size design, offering valuable insights into improving clothing to meet consumer needs.