But generally dress shirts should be in proportion to a man's body. Button-down and rounded collar shirts look best with textured jackets. Double-breasted suits require a spread collar shirt. Side vents on jackets should be properly aligned and anywhere from 3 to 9-inches in length. Center vents should be 7 to 9-inches long.
Unvented coats are a European styling detail and generally make the body seem taller and narrower.
Suits should have smooth, straight seams with a single row of stitching. There should be ample room between the armhole and the elbow. Leave space between hangers so suits and sport jackets will be free of wrinkles. Allow your suit to rest at least 24 hours between wearings and try to alternate suits in order to air out the fabric and relax the wrinkles. Use a clothing brush to preserve the suit between cleanings.