Some languages have whole systems of them. I've been told by a field worker in Guatemala that Ixil has a whole gestural paradigm of numeral classifiers -- hand gestures that indicate whether you're counting animals, people, things of different kinds, undifferentiated "stuff", etc -- gestures that accompany the numeric counters, in speech, as they're used.
On the other hand, some languages don't even have numbers.
English does have at least one word, pronounced /ye/, usually spelled "yea" or "yay" when it has to be spelled, that functions only as a gestural quantifier, as in
- The stick is about /ye/ long.
where the speaker's hand motions and coordinated listeners' eye motions are expected to accompany stressed /e/. This is a gestural version of deixis.
In fact, this is part of Chuck Fillmore's example of a deictically unanchored sentence
- Meet me here tomorrow at the same time, with a stick about yea long.
This is a grammatical sentence, but if you found it on a note in a bottle in the middle of the Pacific Ocean it would be a little hard to understand properly.
(Parenthetically, Deixis is the general category for words, grammar, idioms, and other linguistic phenomena that depend on the particular spatial (here, this), temporal (now, soon), social or personal (yours, mine) parameters of one particular speech act.)