The total length of all phone numbers (STD code and the phone number) in India is constant at 10 digits, for example 7513200000 signifies a STD code i.e. 751 Gwalior & the phone number 3200000. Land line numbers are at most 8 digits long (usually in major metros).
Millimeter definition, a unit of length equal to one thousandth of a meter and equivalent to 0.03937 inch. See more.
1 Meter = 1 000 Millimeters. Meter is a metric system base length unit and defined as the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second. It equals to 3.2808399 feet, 39.3700787 inches. The abbreviation is m.