feet
miles
A tape measure that measure in feet and inches (or meters and centimeters) would be most appropriate.
The meter.
A kilometre. A megametre may be more appropriate but it is not a unit that is used much.
length would be about 1dm, but dms are not used. centimetres would be more mainstream to use
miles
Centimeters.
A centimetre would be an appropriate measure.
A tape measure that measure in feet and inches (or meters and centimeters) would be most appropriate.
A centimetre would be appropriate.
The meter.
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.
You would use inches.
Grams is no good - it is a measure of weight not length. Kilometers measure length - but only if your table-top is a few miles long. Most appropriate would be Meters - your average dining table is about one-and-a-half meters long.
Length would be the most appropriate unit of measurement
The 'foot' or the 'meter' would both do nicely.
Centimetres, millimetres or inches would be most appropriate for measuring the length of a ruler.