I'd like to purchase a diamond impression mat. My question is, what size grid is most popular? Which do most of you use?

I think my 1 inch one is used most.

Good question! I happen to be shopping for the same thing and was wondering if purchasing 2 different sizes would be best...I am not a "straight lines" kinda gal! So, if anyone has any advice on which is the most reliable mat (or if it's better to jury rig something), I'd greatly appreciate it