In Singapore, the possession of sex dolls that resemble children, including those under a specific height like 125cm, could be considered illegal. Authorities may view such dolls as promoting or encouraging child exploitation, which violates laws related to child pornography and exploitation.
Section 377B of the Singapore Penal Code criminalizes any activity that depicts or involves the exploitation of children. While there might not be explicit laws about adultsized sex dolls, if a doll resembles a child or could be perceived as such due to its size and features, it could fall under this legal scope.