How to pronounce 毫米 in Cantonese (3 out of 5):

每個直徑都幾毫米
They have a few millimeters of diameter.

Cantonese Sentence Breakdown

每個 mui5 go3
each; every [written and colloquial]
直徑 zik6 kau3
diameter
dou1
all
both
entirely
(used for emphasis) even
already
(not) at all
metropolis
capital
big city
the whole
elegant
refined
without exception
also
too
still
used in a sentence to add an inference or interrogative tone
gei2
how much
how many
several
a few
quite
shortly thereafter
毫米 hou4 mai5
millimeter