Sitting height is just as important for safe ejections as leg length. My dad was 5'10" but with a tall sitting height and he was just barely under the safety line for a seat in an S-3.
Having short limbs and a long body can indicate the presence of a medical condition known as "Hypochrondroplasia".
> Hypochrondroplasia is a genetic disorder characterized by small stature and disproportionately short arms, legs, hands, and feet (short-limbed dwarfism). Short stature often is not recognized until early to mid childhood or, in some cases, as late as adulthood.