Learn how to say Calibers correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word calibre:
1 [mass noun] the quality of someone’s character or the level of their ability:
they could ill afford to lose a man of his calibre
the standard reached by something:
educational facilities of a very high calibre
2the internal diameter or bore of a gun barrel:
a small-calibre revolver
the diameter of a bullet, shell, or rocket.
the diameter of a body of circular section, such as a tube, blood vessel, or fibre:
the reduction in calibre of arterial vessels
a large-calibred gun
mid 16th century (in the sense ‘social standing or importance’): from French, from Italian calibro, perhaps from Arabic qālib ‘mould’, based on Greek kalapous ‘shoemaker’s last’