I noticed that when using the DracoGuard TF item, it cranks the knot ratio way too high, leading to comically large knots that are as big as the dick is long. Little example after using enough of it until I stopped getting changes, started as human with a 5 inch penis. I don't think the limit for the ratio was set correctly, and there's no items in game to reduce knot size that I know of.
Your sexual equipment is located at your humanoid waist. Your dragon-cock is 16 inches long and 2.7 inches across. With its tapered tip, there are few holes you wouldn’t be able to get into. It is lined with rib-like protrusions, soft and rounded enough to massage any passage into which it is inserted. The obscenely swollen lump of flesh near the base of your forearm-length phallus looks almost too big for your cock. The knot is 11.2 inches wide when at full size. A sack with two balls swings heavily beneath your throbbing member. You estimate each testicle to be about two inches around and 0.5 inches across.