Cleon
Legend
Hmm. I'd go for that, except we're already making them bigger than Green with the Bronze size progression. So I'd either (a) give them the same size as Bronze with standard damage values or (b) give them the Green size progression and your proposed Increased Claw Damage ability. Which do you prefer?
This dragon is 38 feet long, which is closer to a 1E Green Dragon (36 feet) than a 1E Bronze Dragon (42 feet), which suggests we should make them Green Dragon size.
They do have high Hit Dice though, which usually indicates a larger size like the Bronze.
However, they also have the same bite damage as a Green Dragon plus 1d8 damage claws.
Overall I'd go for the "Green plus Increased Claw Damage" option.
However, it's pointless question since Bronze and Green dragons use the same size progression in 3E.
If we wanted to make it bigger we'd have to use the Red Dragon / Gold Dragon size progression, and those species are a good deal larger than the original Sand Dragon (in 1E, a Red in 48 feet and a Gold 54 feet).