Dimensions listed on label are 12' x 20', however dimensions on side of box say 12' x 19'. The following description is from the manufacturer:                                          12 ft x 19 ft Metal Garage

Overall dimension:W12ft *L20ft * H9ft

Storage capacity:Approx.230sq.ft

Wall height: 79"

Specifications:

16-Gauge primary frames

29-Gauge metal roof

Roof with reinforcement

With large double swing doors opening

Front door size : 102"(W)x77"(H)

With one side door entrance

Side door size :35"(W)x 75"(H)

Color: Cream

Extra provide 5% fittings