Now that I've revealed all the members of Spike's family, here's a scale chart. Smite and Chara are quite big, but with how huge Torch was compared to Ember, I'm sure it's normal for some dragons to either wait a while to have kids, or they just grow into gargantuan sizes rather quickly. I'd like to think Smite and Chara are at least well over 50 in the current timeline, but I also think dragons can live to be over 1000 years too. Does this mean Sludge couldn't have possibly been Spike's dad since he is clearly 30-40 years old? Eh, I think Smolder would have pointed that out in "Father Knows Beast". I haven't gotten around to Sludge's current design, but he's going to be a bit taller than Barb and taller than Smite when in rage mode. Sludge gets really huge in rage mode.