25 cm International System Ruler shows all SI prefixes to the meter on one side and on the other side shows Area Volume and Mass interrelationships. These lengths are listed on ruler: yoctometer zeptometer attometer femtometer picometer nanometer micrometer millimeter centimeter decimeter decameter hectometer kilometer megameter gigameter terameter petameter exameter zettameter yottameter (You can buy larger quantities at discount. See separate listing for International System Ruler Wholesale 10 Pack.) Where can I get a metric-only ruler? MetricPioneer.com of course! Keep in mind that some people spell these lengths differently: yoctometre zeptometre attometre femtometre picometre nanometre micrometre millimetre centimetre decimetre decametre hectometre kilometre megametre gigametre terametre petametre exametre zettametre yottametre.
People who register with Metric Pioneer this month are eligible to receive one free International System Ruler upon request. Just contact Metric Pioneer (David) through our Members Directory. (Mailing address must be in an area shown on the Pledge Flag.)