Slab Square Sisy 15 is a very bold, normal width, medium contrast, upright, normal x-height font.
Keywords: headlines, posters, signage, sports branding, packaging, collegiate, industrial, assertive, retro, impact, durability, tradition, high visibility, octagonal, blocky, chamfered, stencil-like, compact.
A heavy, block-constructed slab serif with broad, squared forms and prominent rectangular serifs. Many curves are simplified into octagonal, chamfered corners, giving rounds like C, G, O, and Q a faceted silhouette. Strokes are consistently thick with minimal modulation, and counters are tight, producing a dense, compact color. Lowercase proportions stay sturdy and upright, with short, solid terminals and chunky joins; numerals and capitals share the same squared, cut-corner logic for a highly uniform texture.
Best suited for headlines, posters, labels, and signage where strong presence and quick recognition matter. It also fits sports-themed branding, team marks, and packaging that benefits from a tough, traditional block-letter voice. Use with generous tracking and line spacing if set in longer passages to keep the texture from feeling overly dense.
The overall tone is bold and no-nonsense, with a strong collegiate and workwear feel. Its faceted geometry reads as rugged and mechanical, projecting confidence and a slightly vintage, signage-like energy.
The design appears intended to deliver maximum impact through thick slabs and chamfered, square-built forms, echoing classic block lettering used in athletic, industrial, and vintage display contexts.
The faceting and large slabs create crisp edges and strong silhouettes at display sizes, while the tight counters and heavy weight can darken quickly in long text. The design’s geometric consistency across letters and numerals makes it especially effective for short, high-impact lines.