SB in 6/12 played with $2 chips

[Ghazban]

What is the small blind in a 6/12 game played with $2 chips? Is it a $2 (1 chip), $3 (2 different denomination chips), or $4 (two chips) blind? I was talking to somebody in the 4/8 game at Foxwoods (also using $2 chips) about how a 6/12 would be better than the 5/10 kill they have now and he asked me what the blinds were. I honestly had no idea as I've only played 6/12 once in my life and that was at the Mirage with a mishmash of $5 and $1 chips that the dealer had to constantly make change for.