A wormhole's ship size is the largest hull it will let through, set by the wormhole type itself. Unlike mass and lifetime it doesn't change as the hole ages — it's a fixed property of the hole. New connections default to Large until you set it.
Status
What fits
Frigate
Frigate-sized hulls only (frigates, destroyers, and similar).
Medium
Up to battlecruiser- and industrial-sized hulls.
Large
Up to battleships.
Extra Large
Capital-class hulls — carriers, dreadnoughts, freighters, and the like.
Recording ship size stops someone bringing a hull that simply can't fit — and lets autopilot avoid routing a large ship through a frigate hole.
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