Customs officers at the UKs Stanstead Airport intercepted the package and contacted police, who followed the address on the package to 33-year-old Simon Glerum.
When they searched his home they discovered indecent sexual material on his computer involving children.
Glerum was arrested and charged with importing a prohibited or obscene article - the doll - as well as three counts of making or downloading indecent images of children.
He pleaded guilty to five separate counts of sex crimes against children and is awaiting sentencing.