22" Pit-to-pit, but I'm doing that edge-to-edge. Seam-to-seam is right about 21 1/2", so I'm assuming that's how Nepenthes did it. I don't have an XL from the original run on hand to compare, though. It's a stretchy fabric, so I'm not surprised that there are some minor discrepancies.edit:That tape is not taut either.
11/18/14 at 1:22pm