Micrometer or vernier caliper
For the width of a penny and a dime, you would typically measure in millimeters. The width of a penny is approximately 19.05 mm, and the width of a dime is approximately 17.91 mm.
millimetres
METERS!!!The unit of measurement you would use to measure the width of your classroom is meters.
You can use a penny for that. Put in between the threads then mark and measure the depth on the penny.
You could use either inches or centimeters to measure the width of a sheet of paper.
centimeter?
Parsecs
Centimetre.
A tape measure.
a ruler
You use a ruler or tape measure.
Millimetres