If you want to achieve your V-shape look, you need to work on the shape and size of your shoulders. Check out the top 5 most effective shoulder dumbbell exercises :
1. Dumbbell Shoulder Press: This exercise targets your entire shoulder.
2. Dumbbell Shrugs: Dumbbell shrugs are focused on your trapezoid muscles.
3. Dumbbell Front Raises: This exercise will give the front part of your shoulders a full look, as well as a round shape.
4. Dumbbell Side Raises: Dumbbell side raises put all of the stress on the outer part of the shoulder.
5. Rear Flyes: This exercise is the best one at isolating the rear deltoid muscle.
Source : Gymguider