"5 cm long" is correct and usable in written English.
You can use it to express a measurement, such as "The thread was 5 cm long."
The three large broad petals, 2.5 to 5 cm long, usually bear a conspicuous basal gland.
Triopticus is a small animal – the preserved dome of the skull is only around 5 cm long even though it is from an adult animal, but what there is of it is very unusual.
The catch ranges in size from whitebait and baby eels, both about 2 inches (5 cm) long, to bluefin tuna, up to 14 feet (4.3 m) in length.
At about 5 cm long, R. emeraldi is the largest Raorchestes species known.
The seven samples are 5 cm long and 1 cm wide.
The rupture was approximately 5 cm long extending from behind the pubic symphysis.
Rhizome to 50 cm long, white villous when young; internodes 1 5 cm long, 0.5 0.8 cm across.
The stem is 2 5 cm long, 1 2.5 mm thick, equal in width throughout, hollow, cartilaginous, and brittle.
The cap of this fungus (known technically as an apothecium) is 2-4 cm in diameter by 2-5 cm long, with a conical or bell shape.
The stem is solid (i.e., not hollow) 3 5 cm long, 10 15 mm thick in the upper part, expanding to 2 2.5 cm at the bulbous base.
The stem is 3-5 cm long and 1.5-2.5 1.5-2.5k, and mmre or less equal in widthickroughout its length or slightly lander near the base.
