they're not accurate...the hood doesn't match up with the OEM one hahah
anyway, as cheap as i am - i don't think i'd ever want to be seen with a paper hood on my lens. and if i were to sling my camera to my side, i'm sure the paper would just crumple against me.
If you cut out the shape from a printed paper template and use that to mark it out on some stiff black plastic sheet (eg from an old plastic file) it should work quite well.
I usually leave the lens hood on my lenses so as to avoid having to put the lens cap on and off. I don't have a hood for the 10-22, so a round one will come in pretty useful.