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National Health and Nutrition Examination Survey

1999-2001 Measuring Guides

Model Name: Concentric Circles

A set of hard disk concentric circles and a set of floppy disk concentric circles

Hardk disk set (HD) and floppy disk set (FD)

Product Information
Model Manufacturer
HDCustom Made
FDCustom Made


Model Diameter (inch)
HD2, 2.5, 3, 3.5, 4, 5, 6
FD5, 6, 7, 8, 9

The hard disc set comprises seven white plastic circles. The floppy disc set comprises five brown vinyl fabric circles. The diameters of these circles are specified as above.

The circles are used to help estimate the diameter of round foods such as cookies, pancakes, biscuits, pies, and tortillas.



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  • Page last reviewed: November 6, 2015
  • Page last updated: May 20, 2010
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