The Centre for Excellence in Universal Design in Ireland has developed a really useful set of fact sheets on considering body size and shape in designs.
The Overview fact sheet explains some of the statistical measurements used and how they can mislead designers.
The Data fact sheet explains the steps in using the data within minimum and maximum values
The Adjustability fact sheet looks at “accommodation” and “adjustability” factors.
The Testing fact sheet introduces user testing and identifying how users will interact with the design, and lists the steps to take in a user study.