Calves and forearm suffer from the same blight; that is that genetics play a large role in their development. The way your muscles develop and how they turn out has a lot to do with exercise, but muscle insertions will determine a lot of the way they will end up looking and this, i'm afraid, is genetic and can't really be changed (asymmetrical abs are a simple example).
If you have small hands and feet you will most likely have a small wrist and ankle circumference, which in turn will mean that you most likely have very long and thing tendons there. These can't be trained and thus you will either have to isolate the muscle above it really badly, but even then it's no guarantee and you will always have small calves and forearms. Now I say 'most likely' a lot here and that's because there's always exceptions to the rule. Calve isolation did nothing for me, but forearm isolation did (i stopped doing it because i felt like my arms started to look like chicken drumsticks with my small wrists and hands).
There is something to be said for the ecto, endo and meso theory. I don't think you can put people in one of these 3 boxed all that easily, but whenever I do it's mostly based on muscle insertion, mainly the wrist and ankle.
You can often tell if a bodybuilder came to be from a skinny lad or a average/fat guy. The ones that came from skinny will often have still have thin wrists and ankles and thus small (or high up) calves and forearms.
The pic FEOS posted, however, is just a twat, considering his upper body is doing just fine.
