Help buying a body suit

Helloooooo friends. I am wanting to get a body suit like this so I can have a similar outfit thrown together, but am having trouble with sizing. I have broad shoulders and don't know what sizing w ould be best or which brand would be good to buy from. Does anyone have any experience on this that could pass on some helpful tips? :3

https://preview.redd.it/1ocd7ap1z55h1.png?width=1188&format=png&auto=webp&s=825cbc89628aa6ae5a2785fe78aed296b340386e