Shapes of most sugar lumps

I believe the answer is:

cubes

(Other definitions for cubes that I've seen before include "1, 8, 27 etc" , "Geometrical solids" , "Eg, eight, twenty-seven" , "Three-dimensional shapes with six sides" , "Solid bodies" .)

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

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.