How do you guys measure the centering on a card?

[mredsox89]

So i need to measure the centering on a bunch of my cards to get them ready for a BGS order and i searched my house and couldn't find a ruler or tape measurer. Im also looking for quicker and simpler ideas and wanted to see how other people measured it.

And if you use an online technique or other could you share? Every online ruler i try to get gets blocked by my spyware.

 

[Messier2]

To be honest, I just eyeball the card. I can pretty much tell if the card is going to get a 9 or 9.5/10. I've done this grading-thing enough to pretty much not need any other tools than my eyes to "measure" grading.

 

[adamcm]

I like using an Omnigrid.

 

[arod305]

I figured most people just used their eyes? Thats what I have always done?