Carpentry/Construction is done in millimetres (with the occasional length shortened to metres). I've never heard anyone use cm. Eg: to pay for some timber at

Carpentry/Construction is done in millimetres (with the occasional length shortened to metres). I've never heard anyone use cm. Eg: to pay for some timber at bunnings you might say: "ninety by fourty-five. one length at two-four". (90x45mm timber, 2.4m long). On site - if you needed to cut it - you would measure and cut at "twenty-three-fourty-two" (eg: 2.342m or 2342mm)