So you're going to splurge on that tux. Before you do, you should learn how to size it right.

No matter how nice your tuxedo looks on that hanger, it won't mean a thing if it ain't got that...fit. You definitely don't want a high-water, too-tight, or too-loose suit that will make you look like a goofball on your wedding day. Make sure you get the right size by following these guidelines.

The Basics

• Jacket
  Your jacket should fit comfortably at the neck and shoulders and fasten easily. Try standing and sitting with it buttoned.

• Shirt
  About 1/4 inch to 1/2 inch of your shirt's cuff should show below the jacket sleeve. It should fit comfortably at the neck, shoulders, and waist.

• Vest
  Vest buttons should line up with your jacket front, and the vest should button comfortably across your chest. The bottom should slightly overlap the trouser waistband. The vest's waist can usually be adjusted with a slide strap in the back. Consider a vest with a full back. When jackets come off during the reception, guests will see the real deal instead of a strap and the back of your shirt.

• Trousers
  These should button comfortably and feel good when you sit. The hem should break just over your shoe tops so that it covers the top 1/3.

• Bow tie
  Always try on a bow tie before buying or renting one. It should fit snugly around your collar.

• Shoes
  Remember that the best time to try on shoes is at the end of the day, when your feet are slightly swollen (which they'll almost certainly be by the end of the wedding). Better for shoes to be too roomy than too tight.

Comfort is Key

Size it Up

If the suit doesn't fit, you'll still have time to run back to the rental shop or the tailor to get the kinks worked out.