This document is the eleventh in a series of Tobacco Knowledge Summaries and is prepared with the objective to summarize the current evidence on the association between tobacco use and stunting. This concise advocacy tool aims to inform and mobilize health professionals, policymakers, and advocates. ▪ Tobacco smoking is one of the critical factors associated with stunting in children. Other correlates include low socioeconomic status, low parental education level, young maternal age and poor maternal health status, poor nutrition and repeated respiratory infections. ▪ For postnatal growth, it remains unclear whether the observed associations are causal or non-causal, whereas for fetal growth, there is stronger evidence supporting a causal relationship. ▪ A higher incidence of stunting has been found among children whose parents both smoke tobacco, and the risk increases with greater exposure to smoke. ▪ Tobacco smoking during pregnancy is associated with preterm birth, fetal growth reduction and other complications. Birth length and weight are the most robust predictors of linear growth status and stunting at 2 years of age. ▪ Heavy maternal tobacco smoking (smoking one or more packs of cigarettes per day) is associated with a graded effect on fetal growth; residual effects are seen later in life as well. ▪ Sufficient evidence is available to suggest that tobacco cessation during pregnancy has a positive effect on child growth.