If you want to be thinner, you can choose a looser style to mix and match, and the whole looks fuller.

1: coat: plaid shirt, plus a hooded sweater, coat: coat that can match your look, bottom: khaki slacks, shoes: white shoes.

2. Jacket: T-shirt, plus a baseball sweater, coat: down vest, color options: dark green, navy blue, black gray, lower coat: light jeans shoes: camel elk boots.

3. The above styles are: handsome, neat and casual, so try it.

I hope I can help you.