for the shape of the collar tell them you want the back of your collar to look like mine , this is a picture they sent me of someone wearing my jacket so i could get an idea of what it looks like. As for the shape in the front, they pretty much already do jacket 3’s shape. For the rest of the look, #3’s has a baggier look so maybe the best way to achieve that for you is to get your measurements by a tailor and then calculate what a size up in specific areas would be for you, while keeping it your normal size in the mid section like ricks
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