Gearbox drain and fill bolt sizes 1.6L

I have a 1.6 litre Getz and will be changing the gear oil within the next month or so. I would like to get a magnetic drain and fill plug beforehand so that I have them on hand when I need them.

Would anyone know the sizes?
(I know that the engine sump plug is 14mmx1.5)

Many thanks,
Paolo5