SIS E2

The SIS E2 paper size defined by the Swedish standards body measures 439 mm x 621 mm. With an area of 0.27 square meters, it fits snugly between SIS E1 and ISO A1 in the progression of width and height.

Being one of the lesser adopted Swedish format extensions, the SIS E2 does not tend to have well known alternate monikers. The dimensions may simply be referred to by their metric measurements in Swedish on occasion.

Potential applications of the obscure SIS E2 paper size could include oversized brochures, folding maps, some packaging and display designs, as well as large presentations and plots for visual data. But everyday use cases are limited.

The SIS E2 emerged from Sweden's effort to plug perceived gaps between existing ISO standard sizes. The goal was to provide more incremental options for scaling content across progressively smaller formats. But the attempt foundered due to the substantial inertia behind the ISO status quo, the lack of global adoption, and economic considerations around manufacturing. So today SIS E2 remains mostly unused outside Sweden as an esoteric artifact of the standards challenge. Its story highlights the difficulty of dislodging entrenched norms.