Snow Chain Yaris My 2015.... is it possible??

[Ronny94]

Hi everyone,
I'm writing from italy, and i have a question that i didn't find an answer...

i need to know if is possible to mount snow chain on the yaris my 2015, that mount the 175/65 15' wheels... i read on the owner's manual somethings about 4mm chain's, but i didn't understand what that 4mm means... i don't want to buy a winter tyres cause, here in italy, where i live, seldom snows, so i need the chain jut in case that i will need to drive on a snow...

let me know if someone of you had expirience with that.

Thanks in advance, and sorry about my english... if you don't understand somethings, i will be happy to explain it better.