Shortening that omits "gram" (4)

I think it could be either:

Which length description are you looking for?:

kilo

(Other definitions for kilo that I've seen before include "Unit of weight (abbr)" , "Metric weight, informally" , "possible drugs unit" , "Measure of weight" , "more than two pounds" .)

I've seen this clue in The New York Times.

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