Ken He's a Doll!discusses the collection of Ken doll by Mattel Inc that was presented as a boyfriend of Barbie. Mandeville, A. G. (2019). Dolls, 38(4), 12–14.
Ken and Barbie at life sizeNorton et al used their skills in anthropometry and the rules of allometry to scale the Ken and Barbie dolls to an adult height to determine the dimensions that these dolls would assume at this adjusted size. The probability for a body shape such as Barbie's is less than 1 in 100,000, whereas Ken is more realistic at about 1 in 50. Norton, K. I., Olds, T. S., & Olive, S. (1996). Ken and Barbie at life size. Sex Roles, 34, 287–294. https://doi.org/10.1007/BF01544300