Indoor hockey sticks look the same as outdoor hockey sticks, with the most significant difference being that indoor hockey sticks are much thinner than outdoor hockey sticks.
Indoor Hockey Sticks are designed and developed to be much thinner due to the rules of indoor hockey. The regulations stating you cannot hit the hockey ball during indoor hockey have made indoor hockey sticks thinner to stop players from hitting the ball. If you tried to hit the ball with an Indoor Hockey Stick, the head of the stick would fly off!