Other then delts to build frame you need

[Shinichi]

You need to train your postural muscles to have a pulled back look to maximize the width you naturally have, also ribcage expensaion

 

[slaters]

Wow rlly

 

[Shinichi]

Wow rlly

Yeah because it gives you invisible lat syndrome, only difference its because your posture myscles are pulling ur spine back and your ribcage is expanded. Which is why swimmers have broad shoulders (other then clavicles)