Coat: Look at the shoulders. Try to fit your shoulders properly, not too big. When you get older, it will look slippery and narrow. 175 you should be able to hit your shoulders, your shoulders should support people, and you should look at your spirit.
Recommended: slim t-shirt, POLO shirt and short sleeves. Brighter colors, pink, light blue, bright yellow, soot color, shirts are best checked. Striped ones look thinner.