There are several defensive positions (guards or styles) used in boxing. Within each style, there is considerable variation among fighters, as some fighters may have their guard higher for more head protection while others have their guard lower to provide better protection against body punches. Many fighters vary their defensive style throughout a bout in order to adapt to the situation of the moment, choosing the position best suited to protect them.

Boxers who use an upright stance protect their chin with the rear hand in either the low or mixed guard styles depicted below. Crouch fighters tend to use the "peek-a-boo" style, discussed below.

• Peek-a-boo - Sometimes known as the "earmuffs," the hands are placed next to each other in front of the face (like mentioned before fighters tend to vary the exact positioning in which they use it) and elbows are brought in tight to the body(this position can be achieved by bringing the elbows as close together while not straining yourself to do so). This defensive style is what a boxer is taught to do when he begins to box, after they gain experience he can decide to change or vary their guard. This style is middle-of-the-road style in terms of counterpunching and damage reduction. A boxer can counter punch from this stance, but it is difficult. However, there have been boxers who can do this very well. This defense covers up a fighter well, but there are holes. Hooks do damage by going around the hands and by hitting just behind the elbows. Winky Wright uses this style very well from a damage reduction stand point.

• Cross-armed - The forearms are placed on top of each other horizontally in front of the face with the glove of one arm being on the top of the elbow of the other arm. This style is greatly varied when the back hand rises vertically. This style is the most effective for reducing head damage. The only head punch that a fighter is susceptible to is a jab to the top of the head. The body is open, but most fighters who use this style bend and lean to protect the body, but while upright and unaltered the body is there to be hit. This position is very difficult to counterpunch from, but virtually eliminates all head damage.

• Philly Shell or Crab - The lead arm is placed across the torso usually somewhere in between the belly button and chest and the lead hand rests on the opposite side of the fighter's torso. The back hand is placed on the side of the face. The lead shoulder is brought in tight against the side of the face. This style is used by fighters who like to counterpunch. To execute this guard a fighter must be very athletic and experienced. This style is so effective for counterpunching because it allows fighters to slip punches by rotating and dipping their upper body and causing blows to glance off the fighter. After the punch glances off, the fighter's back hand is in perfect position to hit his out-of-positioned opponent. The shoulder lean is used in this stance. To execute the shoulder lean a fighter rotates and ducks when his opponent's punch is coming towards him and then rotates back towards his opponent while his opponent is bringing his hand back. The fighter will throw a punch with his back hand as he is rotating towards his undefended opponent. Floyd Mayweather Jr executes the shoulder lean perfectly according to technique. The weakness to this style is that when a fighter is stationary and not rotating he is open to be hit, so a fighter must be athletic and well conditioned to effectively execute this style. To beat this style fighters like to jab their opponent's shoulder causing the shoulder and arm to be in pain and to demobilize that arm.