Centimeters will do it or millimeters
The best substitute or representation for the height of a popcorn would probably be an acorn or a cotton ball at about 2 cm or 1 1/2 cm
The height of a piece of popcorn is best represented in smaller units like centimeters or millimeters. Centimeters can provide a general measurement, while millimeters offer greater precision. Depending on your need for detail, you can choose between these two units.
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