YOU SAID:

so you are a wore of 12 years

INTO JAPANESE

だからあなたは12年着ています

BACK INTO ENGLISH

so you've been wearing 12 years

INTO JAPANESE

だからあなたは12年間着ています

BACK INTO ENGLISH

So you've been wearing it for 12 years

INTO JAPANESE

だから12年も着てる

BACK INTO ENGLISH

That's why I've been wearing it for 12 years

INTO JAPANESE

だから12年も着てる

BACK INTO ENGLISH

That's why I've been wearing it for 12 years