To estimate the value of \( 6 \times 2 \), we simply calculate it:
\[ 6 \times 2 = 12. \]
Looking at the provided options, none of them appear to be a direct estimate of 12. However, if we're looking for a reasonable approximation and the question is seeking the "best estimate," we can consider the numbers in the options.
The closest number to 12 amongst the choices is 06.4.
So, the best estimate from the given choices is 06.4.