Value Object encapsulating different units of measure
Some quick remarks:


Don't pointlessly abbreviate: you gain nothing with "FromCMeters" or "heightInCms". Just use "Centimeters". I'd even argue that you shouldn't use the plural to express the height; I'd always say "I'm 189 centimeter". Same for "InMeters". (But I'm not a native English speaker.)
There are several magic numbers used repeatedly: 30.48, 2.54, 12. IMHO these should be const with a meaningful name.
I fully agree with Graipher's review: you should use one canonical unit and store its value in a private variable, and InMeter, InFeet and InInches should be "translations" of that unit (e.g. if you store it in cm, InMeter should divide the value by 100).