We can use either meter or centimeter to measure a rectangle. For a large area of rectangle we can also use "feet" or " yards". Using "meter" is a convenient form to measure the length of the rectangle.
cm is not a unit of area, it is a unit of length. If you mean cm2, choose any measure (in cm) for the length, then divide 25 by that length to obtain the corresponding width.
By unit of length and distance and conversion ,we can say that the most appropriate unit to measure the length of a finger is cm.
Inches
cm
I would use feet
You would use meters.
centimeter
yards
You would use the SI unit meter (m) to measure the length of a DVD case.
miles or kilomiters
feet
always the meter to measure length. This is an SI (international) unit of measurment, and is the standard international unit of measurment for length.