Asians may be small in Thailand, Indonesia etc, but in Taiwan, a large segment of the population can be politely termed as plump, chubby, bountiful, full bodied,robust.
The last data I saw had male obesity in excess of 20% and female obesity at 18%.
The pajamas that I have are going to be tight on that portion of the population, many of whom are the people who purchase business class fares.