People of Asian origin have different genes (just as we all do) that make them naturally small and slender.
Asian people also have a faster metabolism rate (rate of digestion) meaning they absorb food quicker.
The theory about Asian people doing more work is only a partly contributing factor.
Slim means slender, lean, or thin. Skinny means gaunt, scrawny, spare, or emaciated (or too slim).
The positive connotation of thin is often associated with being slender, fit, and healthy.
thin. slender.
Some of the beauty pageant judges regarded her as too thin. Others thought she was perfectly slender.
...Seriously? Cuz he's Slender, meaning skinny, thin, etc.
Long and slender
Slender
thin, small, bony
The word narrow implies long and thin, as does slender.
Very thin Waiflike Slender
Thin.
elongate