"Men who work in an office environment need to have four suits that they can rotate," says Chip Tolbert, fashion director of the Men's Fashion Association. "They may want to add one or two a year to update their wardrobe as styles change and to pick up new colorations."

The best fabrics to choose, he says, are lightweight, year-round worsted wools or wool blends, which tailor well and shed wrinkles. Select dark or medium tones of blue and gray for an executive look. A subtle glen plaid is also appropriate, as is a pin stripe. Tolbert says black and brown suits are no-no's for executives.There are additional ways men can be sure they look their best.

Heavy men, for example, should choose dark or medium colors to disguise extra pounds. Stay away from plaids, chalk stripes and light colors. Single-breasted traditional styling with natural shoulders and two buttons creates a slimmer line. Avoid double-breasted jackets, side vents and cuffed trousers, which can make you look heavier.

Short men need to pay particular attention to proportion. Short thin men want to avoid appearing too fragile; stockier men want to be sure they do not look rotund.

Dark-colored, smooth-finish fabrics and single-breasted suits create an illusion of added height. Be sure pants and sleeves are the proper length. Too long overwhelms, too short looks boyish. Pants should be uncuffed.

Tall, thin men should avoid narrow pin stripes, and heavier men should avoid large plaids and light colors. Double-breasted or single-breasted suits in hard- or soft-finished fabrics all look good on tall men.

Be sure jacket, sleeves and trousers are the proper length. Too short looks like it's outgrown. Be sure the back of the suit jacket lies flat. Alterations may be required to compensate for poor posture.