This project was supervised by Prof. Esther Dromi, Tel-Aviv University. The aim of this project was to generate Hebrew lexical development norms for toddlers aged 12-24 months. The norms presented here can be used by scientists and language clinicians as reference to the expected developmental curves for research and practice purposes. Data were collected from Hebrew-speaking parents of 881 healthy monolingual toddlers (12-24 months old). Parents completed a web version of the Hebrew adaptation of the MacArthur-Bates Communicative Development Inventories - Words and Gestures (MB-CDI-WG) as well as a background questionnaire. Parents reported on their child’s receptive and expressive lexicons, and action and gesture use. Hebrew-speaking clinicians please refer to the general guidelines.