Hi all. Hoping someone can help me with this

Can anyone tell me the Distance between the Post Holes On 8.5 x 11" American Crafts Page Protectors (landscape)

I have Purchased some with the intent of Making my own abum... But where i have Ordered from (sarahs cards) is away till the 6th feb.

I thought while i was waiting i would make a start on the Album but i cannot Find what the distance between post holes Would be.

Does anyone have these Page protecors that could measure them for me pretty please

Thanks
Emma