optic fiber cable by TM is tiny.. probably similar size like a standard USB cable,
or for better reference - Apple's Lightning cable thickness.
for installation, i suppose the installer would pull the cables first and only terminate the end
connection with the termination point/patch (not sure what it's called)

my take is - assuming that you're doing in-wall casing/runway for your LAN cables,
the size of the runway/casing should be able to fit fiber cable too.
however, bear in mind that fiber cables might easily break (it's not metal wiring)
thus, avoid super tight turning angles.
those who have done in-wall runway might be able to advise you better.
thanks for the information.
actually wanted to run the casing at preferred 'spot', so the installer just run thru my casing.
it will be 3 walls need to go thru.. i will prepared the wall hole for the cable to run thru.. and its all in straight line