[Moirakris]

I would like to see a list or tutorial that outlines the different dimension conversions

Here is an example from another tutorial I read:
"Photo holiday cards are traditionally 8"x 4", which translates into 2400 x 1200 pixels when scrapping"

I am very new to scrapping and do not know these conversions. I am sure there are others like me out there that would really appreciate this information that is probably really basic to those that have been scrapping for awhile now.

8x4 converts to 2400x1200
8.5 x 11 converts to ________
12x12 converts to ________
8x8 converts to _________
Etc

Thanks for anyone that can help out!!