millimetres or even micrometres.
The most common size of copy paper, notebook paper, and typing paper in the US is 8½ inches wide by 11 inches high. In many other countries, A4 is the most common size of paper; A4 paper is 8.3 inches wide by 11.7 inches tall.
meters
The width of a pin would typically be measured in millimeters (mm).
Pencil lead is very narrow. Millimeter can be used to measure it.
Metres, to measure its length or width, square metres to measure its area.
cm
precision engineerting, e.g. piston ring size in car engines.
The A series paper has a height to width ratio of square root 2 to 1 (1.4142:1) A sheet of A0 has an area of one square metre. To fit the ratio its sides are 841 millimetre x 1189 millimetre. Each sheet in the series is half the size of the previous sheet; the height of A1 would be the width of A0, the width of A1 is half the height of A0, 594 mm x 841 mm. A3 has a height of 420 millimetres and a width of 297 millimetres.
A sheet of A4 paper measures 29.7 centimetres in length and 21.0 centimetres in width. A third of this length would be 9.9 centimetres in length and 7 centimetres in width.
The center of an A4 paper is located at the halfway point along both the length and width of the paper. In other words, if you measure the length and width of the paper and find their midpoints, the center would be where these two midpoints intersect.
It would be 1270mm wide.
METERS!!!The unit of measurement you would use to measure the width of your classroom is meters.
Une feuille de papier is a sheet of paper in French.
A standard sheet of paper is 8 1/2 x 11 so a standard notebook would be very close to those dimensions.
OVER 9000
Centimetre.
Parsecs