its not a bad problem but not one you can really fix. what you can do is include a wrist workout to help build muscle, then like rip said, your wrists will look better with bulging forearms.
try doing these workouts with whatever reps/sets/and weights feel comfortable.
wrist curls - with palms up, hold the weight and curl your wrist up
wrist extenstions - with palms down, hold the weight and lift the weight up.
do the same thing with your palm facing to the right of you and to the left of you. (these may require a ligher weight) for all of these keep your arm stationary, only your wrist will move.
another thing you can so is if you have a broom or hockey stick or baseball bat, hold the very end and with your wrist out, like your holding a glass, rotate your wrist from side to side. this will also help strech your wrist.
the other thing you can do is pick up Aikido, they focus a lot on wrist strength.