By the founding of the North German Confederation in 1867, the Zollverein covered states of approximately 425,000 square kilometres, and had produced economic agreements with several non-German states, including Sweden-Norway.
Setelah pembentukan Konfederasi Jerman Utara pada 1867, Zollverein mencakup wilayah seluas 425.000 kilometer persegi dan menghasilkan perjanjian-perjanjian ekonomi dengan beberapa negara-negara non-Jerman, termasuk Swedia-Norwegia.