Last year I ordered 5x7 orange cardstock for Halloween, it was just simple 80# with nothing on it is this the same thing? I just want to use them for stamping. I ordered from your company but thru Amazon. Hope this makes sense. Thank you

Unfortunately many of our manufacturers are discontinuing the color orange.  But we have still have several Orange Card Stock options available.  In the product's page, you have the option to add cutting to the card stock, so you can request for us to cut the stock to 5x7 inches - we get 2 - 5x7 pieces out of each 8.5x11 and 3 out of each 12x12

Are these prefolded cards? or at least have a line where it is clear where to fold it?

These are flat cards that measure  5x7 inches.  These cards do not have a score line nor are they pre-folded.  We do sell 5x7 folded cards. The folded cards measure 10 x 7 inches and have a score line, allowing them to be easily folded.