This paper gives a broad overview of how Norwegian productively makes use of L-reduplication to convey diminutive meaning. I argue that this previously undescribed phenomenon is a diminutivizing process that copies the stressed vowel and any consonants until the next morpheme boundary. The construction can be attested as far back as the start of the 20th century and its realization varies geographically between two main variants. I show that L-reduplication is restricted phonologically, but applies productively (unlike other echo reduplicative processes) across different parts of speech.