What is the shell width of the bottom bracket of the Giant CFM 3 cadex frame?
You don’t have a ruler, yardstick or vernier caliper?
It is a very simple procedure to simply measure it for yourself. All you need is a metric ruler. You don't even need to remove the cranks to do it
Was you able to get the old bottom bracket out? If so take it by a reputable bicycle shop. They can tell you exactly what you need. If you can't get it out take the whole bike to the reputable bicycle shop.
Are you trying to decide if the Giant frame will fit the bottom bracket you already have?