The all-caps display face Sandwich was inspired by historic, hand lettered sans serif alphabets with slightly sloping terminals, as found in showcard lettering and on billboards.

Besides a number of alternate glyphs located in the lowercase area of the font, the typeface features about forty ‘ligatures’. These are not ligatures in the traditional sense of the word, but short two- or three-letter combinations — mostly prepositions, conjunctions, articles and so on — in different languages, which are positioned vertically, not horizontally. Since the number of such pre-fabricated ligatures in a font is limited and cannot possibly cover all the desired combinations, a special algorithm programmed into the OpenType font permits the user to compose any two- or three-letter words, provided no accented characters are used. This is why Sandwich includes five versions of each letter.

Using the full possibilities offered by the OpenType format, the automatic vertical aligning of glyphs is based on a combination of optional ligatures, style sets, and modified kerning.