men and suits

If your suit jacket's lapel is thin, wear a tie that is thin and visa versa. This will balance the whole look.
If the collar of your shirt is wide apart, wear a big tie knot.
Shirt cuff should be about 2 - 2.5 centimeters above your thumb joint.
Hems of trousers should just touch the back of the heel of your shoes and at the front it should just make a slight fold.
Don't wear a pair of shoes that is lighter than your pants. Example ( white shoes with black pants is a no no!! )
Try and match your socks with the shoes you are going to wear. Black shoes with black socks.....
Front pleated pants should be worn loosely around hips. If pleats open, you know that you should opt for a bigger size pant or pleated styled pants do not suit your body type.