Understanding the Difference Between Futsal & Indoor Soccer

Soccer    Futsal® (Five-a-Side Soccer) 
#5 Ball #4 Ball - 30% less bounce
11 players 5 players
3 substitutions Unlimited flying substitutions (12 Players on a Team)
Throw-in Kick-in
Running Clock Stopped Clock
45 minute halves 20 minute halves
No time-outs 1 time-out per half
Goal kicks Goal Clearance (throw)
Some contact No shoulder charges or sliding tackles
No absolute time limit to restart game 4-second rule on restarts
Offside Rule No Offside Rule
Goalkeeper steps No restrictions, but limited to 4 seconds
Goalkeeper cannot touch by hand a ball kicked back Goalkeeper cannot touch by hand a ball played back
Unlimited back passes to Goalkeeper One back pass to Goalkeeper
No sub for player sent off Player sent off can be substituted for after 2 minutes or other has scored
Corner kick placed in arch Corner kick placed on corner