The Technical manual for the construction and use of family-sized metal silos to store cereals and grain legumes presents simple instructions for the construction and use of various types of family-sized silos, with capacities of between 0.12 m3 and 4.2 m3 (approximately 120 and 4 000 kg). The contribution of this type of silo to food security, to meeting the Sustainable Development Goals and to the well-being of small farmers is extremely important, particularly during agricultural crises caused by a number of external factors, including financial problems. The silos have a key role, not only to safeguard family nutrition in the peasant sector, but also so that small farmers can regulate trading in surplus goods and have access to markets when they are favourable. The manual contains guidelines for the use and manufacture of family-sized silos at low cost, accessible to craftsmen and farmers. The manual is based on field experience gained by the Swiss Agency for Development and Cooperation (SDC) and subsequently by numerous projects carried out by FAO in more than 22 developing countries.