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Base wheel: 4" diameter x .020". Top wheel: 3' diameter x .020" white vinyl plastic. This birth date calculator will allow a doctor to determine the approximate date for a baby's birth. Shows 1st, 2nd

Birth date calculator features an extra large imprint area at the top with all the features of our other pregnancy calculators.Material: Plastic, VinylColor: WhiteMinimum Production Time: 12,15 day(s

Base wheel: 5" diameter x .020". Top wheel 4" diameter x .020" white vinyl plastic. A larger version of our popular Birth Date Calculator, this tool allows a doctor to determine the approximate date f