Halloween parties are an opportunity to get dressed up in a costume that can be a strict departure from your personality. Even if you don't play "the beautiful game," donning a soccer uniform and dribbling a ball around your party won't generate any confusion as to the nature of your costume. Putting this simple costume together is as easy as a trip to a sporting goods store.
The jersey and shorts you wear for your soccer costume provide an immediate clue as to the nature of your costume. Both integral pieces of the uniform don't have to directly match, but they should have complementary colors. In general, the jersey should have a number on its back; if you choose to buy an authentic team jersey, it will likely also have a sponsor's logo and the team's crest on the front.
A pair of soccer cleats, a set of shin guards and some high-top socks round out the rest of your soccer uniform, giving you the authentic appearance of a soccer player. Choose cleats and socks that match or possess colors complementary to your uniform. Place the shin guards against your shins and pull the socks high to cover the guards. All these items are commonly available at sporting goods stores.
To dress up as a soccer goalie, buy a pair of goalie gloves. These protective devices, which have a similar appearance to oven mitts, won't allow you to shake hands at your Halloween party, but will help your look. Regardless of the theoretical position you wish to play, a soccer ball completes the costume. When dressed as a goalie, carry the ball with you. Otherwise, practice dribbling the ball carefully in front of you.
With a little creativity, you can accessorize your body to give the appearance that you walked straight off the soccer pitch and into the Halloween party. Thoroughly wet your hair with water to give the appearance of sweat and squirt water on your face and your jersey. Additional aesthetic changes include scuffing your uniform and socks in dirt or placing grass stains on them before getting dressed.