Industry: Design

Euclid

Five geometric voices, one construction system

Euclid is a family of five geometric sans-serif collections—Flex, Circular A, Circular B, Square, and Triangle—designed by Emmanuel Rey at Swiss Typefaces, with Cyrillic development by Liudmila Bredikhina and font engineering by Christoph Koeberlin. All five share core geometric construction (circular 'o', monocular 'a' and 'g', high-center 'M') while diverging in terminal treatment, aperture, and overall character. Each collection spans five weights and supports Latin and Cyrillic scripts with professional OpenType feature sets.

Set in Euclid Flex, Euclid Circular A, Euclid Circular B, Euclid Square, Euclid Triangle

Insights

The five subfamilies are not intended for mixed use—Euclid Flex is the sole exception, designed to serve as a display companion to any of the others.
Circular A uses horizontal terminals (curves cut parallel to baseline); Circular B uses diagonal terminals for select glyphs only (e.g. 'c' and 'S', but not 'J' or '3'); Square uses diagonal terminals cut perpendicular to the stroke—positioning Circular B explicitly between the two.
Euclid Circular A and B feature longer extenders than the other subfamilies; ascenders in 'd' or 'l' exceed cap height, producing more distinctive word shapes.
Euclid Flex organizes its stylistic alternates into eleven named sets, including angular, diagonal, dotted, biform, and paint-drip variants.