Trying to print 50 invites that I bought at Staples. Simple flat cards, 5.5 x 8.5.

I did page setup as per the box with 5.5 wide and 8.5 high but when I go to print, my printer says paper too small and cancels print job and spits the test paper out. I am able to print it on the center of a full letter size paper but for me to load the half size cards, I have to set the paper guides to one side and it does not seem to like that.

I also went into printer properties and tried to change the size of the paper but 1. there is no custom setting option and 2. when I tried to chose a 5x8 index card, it still said paper too small. The box does suggest manual feed but I do not know if I can even do that on my printer... HP Photosmart 8250. Any ideas of what I can try?

At the suggestion of DH, I tried to page set up back to letter size and adjust the margins so my wording would print in the proper place. I prints fine on letter size but when I put the 5.5x8.5 test sheets in... too small.

What the dillio yo?! Anyone have experience with these invites/printer who can offer a tip that I am missing?

The invites website was of no help.

Thanks!