Objective: This study aimed to identify the major morphological dimensions of seated body shape and classify seated body shape types among male wheelchair users with spinal cord injury to provide anthropometric data for wheelchair-usercentered apparel design.

Background: Conventional apparel sizing systems are primarily based on standing anthropometric measurements and may not sufficiently reflect body shape variations observed in seated postures among wheelchair users.

Method: Data from 246 participants were analyzed using principal component, cluster, variance, and cross-tabulation analyses.

Results: Four morphological dimensions were identified: upper body vertical height, limb length, lower-limb and trunk girth, and upper body breadth and chest depth. These components explained 77.97% of the total variance. Four seated body shape types were classified: long-limbed and trunk girth-developed, narrow and shallow upper-body, slender-girth and broad upper-body, and short-limbed types. Significant differences among the types were observed in upper body height, limb length, trunk and lower-limb girths, upper body breadth, chest depth, and several proportional indices. Age group was significantly associated with body shape type distribution, although the magnitude of the association was small.

Conclusion: The identified seated body shape types highlight the limitations of standing-based sizing and provide a basis for wheelchair-user-centered pattern development.

Application: The findings may serve as fundamental data for developing wheelchairuser- centered sizing systems, ergonomic apparel patterns, and subsequent virtual and physical fit evaluations.