*scratchhead* How exactly are the numbers giving in your table any different than those in my graphic?
4-8 for medium, 8-16 for large...
The first black figure is the minimum for medium, the grey beside it is average for medium (6 ft), it's not the max or anything. And the next black one is max for medium and min for large...
And so on. One size category goes from black to black.
Anyway according to your table, small is 2-4 ft tall, and large is 8-16. That's 3 and 12 on average or a factor of 4.
As I said unless Biscuit is really small for Large size and the goblins tall for Small size, I don't see it...