Using data at firm level this paper studies the behavior of Brazilian firms that exports a share of its production. The main findings are: only a small fraction of firms sell to foreign countries, most exporting firms sell to few markets, variations in Brazilian exports across destinations represents differences in number of Brazilian firms selling there much more than the amount that each one sells, exporting firms are larger and more productive than non-exporting firms. About 40% of the exporting firms sell only to the Mercosul, those firms are smaller and less productive than the firms that exports to others countries.