Typeface Design for Basel Grotesk

One skeleton, two optical worlds

Basel is a type family by Chi-Long Trieu for Optimo, structured around two variants—Grotesk and Classic—that share the same skeleton and weight gradation. Grotesk reinterprets modernist sans-serif conventions with added dynamism, while Classic introduces decisively contrasting stroke. A variable axis for stroke modulation, alongside weight and italic axes, bridges the two variants. The family originated in 2013 and developed through use in publishing and fashion contexts.

Set in Basel

Insights

Both Grotesk and Classic share the same skeleton and weight gradation; Classic distinguishes itself through decisively contrasting stroke.
Basel Variable adds a stroke-modulation axis on top of weight and italic axes, extending the family's range beyond the static variants.
Nineteen stylistic sets cover individual letter alternates for a, g, l, t, u, y, G, I, J, and R; rounded diacritical dots; circled and black-circled figures; alternate symbols; lowercase math symbol positioning; small proportional and tabular figures; and a multiply-sign substitution.
Mono subfamilies exist for both Grotesk and Classic, each spanning the same nine weights with italics, extending the system to fixed-width settings.