Under a new EU ruling, tobacco companies will have to cover at least 30% of the front of the packet and 40% of the back with the warnings.
No more 'lights'
They will also no longer be allowed to use phrases like 'light' and 'mild' on packets.
The new ruling will limit the actual amount of nicotine that goes into cigarettes as well.
Smokers in this country could see the bigger warnings on packets from next autumn.
UK Cigarette packets may eventually show graphic images of the health risks like nasty pictures of damaged lungs.