größes

Größes is not a standalone lexical item in German; it is a form of the adjective groß. In modern usage, the attributive neuter singular form after an article or without an article is written as großes. It appears in phrases describing a neuter noun, for example: ein großes Auto (indefinite article) or das große Auto (definite article). In predicate position, as in das Auto ist groß, the adjective does not take the same attributive ending.

The spelling größes would be considered nonstandard in contemporary German; the standard form in attributive position is großes. Variants with umlauts on the stem are uncommon in standard orthography and may appear only in older texts or as typographical error. When adjectives are used in a predicative position after a form of sein, bleiben often die Endungen aus: Das Auto ist groß.

Größe is a related but distinct word: it is a feminine noun meaning size or magnitude (die Größe, plural die Größen). As a noun, Größe takes different inflection and is capitalized. The plural Größeneinheiten oder Größenordnung are used in contexts like “Größenordnung” (order of magnitude) or “die Größen der Autos.”

In sum, größes functions as a neutral singular attributive ending of the adjective groß in modern German, while großes is the standard spelling; größes is generally nonstandard. The noun counterpart is Größe, a separate word with its own meanings and inflections.