Knitting needle case directions?

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I'd like to make one of those knitting needle holders for a friend of mine, but I don't knit (yet, anyway).

Which means, I don't have knitting needles to use to figure out how to make one, and I don't know how many pockets and what sort of things would be helpfull to just make it up out of my brain.

Does anyone have directions to make one of these? I don't know how big and/or tall the pockets should be, etc.

Thanks!!