A 3mm long insect would be a very small ant or a small bug
3 mm.
7 mm is about a quarter inch and 3 mm about an eighth of an inch.
About 2/3 the size of a right angle
I'm wondering what the original, or book, question actually asks, but in this case, a it is a circle larger in radius, diameter and circumference by the ratio 4:3; and in area by the ratio 16:9.
113.1 mm^3
About 3 centimeters (1.18 inches) in diameter... Radius 15mm Circumference of 9.42 cm, or 94.2 mm
9 millimeters
46.5 millimeters is 1.83 inches.
An 8 mm mass is roughly one third of an inch. If you look at a ruler, this will give you a good idea of the size of such a mass. There are 2.54 cm or 25.4 mm in one inch. Therefore, 8 mm is just shy of 1/3 inch.
3 mm.
it is about the size of a kidney bean , so a 2 mm kidney stone is rather large to us but not the a dr. they will not remove them untill they are about 6 mm in size and or obstructing your urine.
2.25 mm is 3/32 inch
30 mm is virtually identical to 1-3/16.
What is the size of a 4MM kidney stone? Comparable to a BB or a Pea? 0.157 inches to 3 decimal places, or practically 5/32 inch, so smaller than a pea.
3/64 of an inch
7 mm is about a quarter inch and 3 mm about an eighth of an inch.
About 0.33 (1/3) inch.