...I actually had never thought of checking ebay for fabric.

I've already bought the canvas (and it couldn't hurt to get some more practice in before buying 'nice' fabric- going to try a wider apron this time, the one I've got feels too narrow, and the first kilt made me update my measurements a bit) but that's actually a damn nice price on some of the stuff I'm seeing... what sort of weight would I be looking for, specifically- I know 16oz tartan is what's used for "traditional" kilts, but where does, say, 11oz compare?