The World Trade Organization provides authoritative data about global trade, trade policy, and related economic issues. Its databases and publications provide access to data on trade flows, tariffs, non-tariff measures (NTMs) and trade in value added.
Data on annual trade in merchandise are available in the WTO's Data Portal https://www.wto.org/english/res_e/statis_e/statis_e.htm and its International Trade and Market Access Data pages, an interactive tool. That data includes exports and imports, broken down by commodity group and by selected economies/regions. https://www.wto.org/english/res_e/statis_e/statis_bis_e.htm
Other sources of trade data include the UN Comtrade Database https://comtrade.un.org/, IMF Data (https://www.imf.org/en/Data, Eurostat (https://ec.europa.eu/eurostat/web/euro-indicators/international-trade), and various national sources. Where needed, reported data are complemented by estimations produced by the WTO.
Annual WTO data are updated in April and October of each year. This includes total values and data broken down by economies and selected regional and economic groupings. The October update also includes data broken down by commodity groups/regions. Trade data are also measured by numerous organizations, including the US Census Bureau’s Foreign Trade Division, at https://www.census.gov/foreign-trade/index.html.