Retro style is hip, so are early 20th century poster fonts. Size is based on these extra condensed letter forms.
In the 19th century the need to communicate commercial messages on limited poster space brought up extremely condensed fonts creating a new typographical look. Since not really legible in small sizes these fonts nearly disappeared with the change in the commercial communication in the 20th century.
For a couple of years now, these extra condensed fonts have a revival copying the exact historical appearance of its predecessors. Size, though also seeking the inspiration in the historical draft, furthermore aims to interpret this compressed look in a more vivid way by not closing in on the open counters of the round letters, but having its stroke endings slightly curved. Since other characters are defined by straight strokes, Size displays a look more vital and candid, but still distinct, compared to its historical predecessors.