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The short answer
Futsal balls have a deliberately low bounce — Select fills the bladder with microfibre polyester specifically to kill the rebound — because the game is played on a hard surface in a small space. They also use their own sizing convention: futsal size 3 is for under-13 play, size 4 for 13 and up. It does not match outdoor sizing.
Two things surprise people about indoor soccer balls. First, the ball is genuinely different rather than just smaller. Second, the sizing numbers mean something else entirely, which is how families end up with the wrong ball while believing they checked.
The sizing, because it catches everybody
Futsal size
For
Roughly equivalent to
Junior / size 3
Players under 13
Outdoor size 3 in diameter, but heavier and much lower bouncing
Senior / size 4
Players 13 and up
Outdoor size 4 in diameter, again heavier and lower bouncing
Scroll the table sideways on a narrow screen.
So a futsal ball marked size 4 is the senior ball, not a U9–U12 ball. Senda's own guidance describes futsal junior as equivalent to a size 3 from other brands for players under 13, and futsal senior as equivalent to a size 4 for players 13 and older. Futsal ball vs soccer ball puts the two official specifications side by side, including the bounce rule.
Futsal labeling is at least simpler than outdoor: the convention is Junior for under-13 play and Senior for 13 and up, which is how Select labels its Jinga range. Buy by that label rather than by reading a number off an outdoor size chart.
Start here
Pick by your kid’s level
The right answer changes with the level, not just the shoe size. Find your kid’s bracket and start there.
Age-graded across three models, which removes the sizing confusion entirely. Select's low-bounce bladder is the real thing rather than a resized outdoor ball.
Tap any row to jump to the full write-up. The price in each button is the one Amazon reported on the date stamped under it — tap through for today’s number, which is the only one that can be relied on.
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Product
Best for
Surface
Fit notes
Price
1
Select Jinga Futsal Ball (Junior)The right ball for a real indoor or futsal season, and the Junior size means a younger player is not handed an adult ball.
U7–U8 rec, U9–U10, U11–U12
Futsal (low bounce)
Buy the Junior size for U8 through about U12 and the Senior (size 4) above that.
Product photos come from each item’s current Amazon listing.
Why the low bounce matters
It is not a technicality. Futsal is played on a hard court in a small space, and a normal ball on that surface spends the session in the rafters — which means very little actual play and a lot of retrieving.
The low bounce keeps the ball on the floor, which is why futsal is so effective at developing close control. Kids get far more touches per minute than they do in outdoor soccer, and every one of them is a controlled touch rather than a chase. That is the genuine argument for a winter futsal season, and it depends on having the right ball.
Select achieves it with a butyl bladder filled with microfibre polyester, which the brand describes as producing an extremely low bounce that makes the ball easy to control.
Do you need one?
Depends what 'indoor soccer' means in your case, and the two are often confused:
Proper futsal, on a hard court with futsal rules — yes, and the league will usually specify the ball. A normal ball is genuinely unplayable.
Recreational indoor soccer on a gym floor or an indoor turf pitch — often not. Many programs just use a normal ball at the age-appropriate size. Ask before buying.
Indoor turf facilities in particular usually use ordinary outdoor balls, because the surface behaves more like grass than like a court.
What else changes indoors
Two things beyond the ball, and the first one will stop your kid getting on the court:
Footwear. Indoor facilities require a flat, non-marking gum sole. A turf shoe is usually refused at the door, because the nubs mark a sports floor. See the indoor shoe picks.
Shin guards. Most indoor leagues still require them, and a smaller pitch arguably makes them more useful — more tackles per minute and less space to avoid one. See do you need shin guards for indoor soccer.
One futsal ball is enough
Unlike outdoor balls, there is no case for a second futsal ball. It gets used on a clean indoor court for a defined season, so it does not get lost in hedges or left in the rain, and the low-bounce construction is wrong for outdoor use anyway — heavy and dead on grass.
Which also means: do not let a futsal ball become the yard ball. It is the wrong tool and it will teach your kid a strike that does not translate. Keep the outdoor ball for outdoors — see the size 3 and size 4 picks.
1. Select
Select Jinga Futsal Ball (Junior)
The right ball for a real indoor or futsal season, and the Junior size means a younger player is not handed an adult ball.
Best for
Indoor and futsal play, sized by age
Levels
U7–U8 rec · U9–U10 · U11–U12
Type / surface
Futsal (low bounce)
How it fits
Buy the Junior size for U8 through about U12 and the Senior (size 4) above that. A futsal ball is graded by bounce rather than by the outdoor size chart, so do not read Junior as a size 3 outdoor ball.
What we like
Split into Junior and Senior rather than sold in one adult size, so an U8 is not playing with a size-4 ball
The genuinely low bounce is the whole point of a futsal ball and cheap indoor balls do not deliver it
Where it falls short
The heavy, low-bounce feel is wrong for outdoor grass play, so this cannot be the only ball
Costs more than a rec outdoor ball of the same nominal size
Manufacturer’s published specs
Butyl bladder with polyester fibers inside, which Select credits for the bounce and control (Select)
Sold in a Junior size as well as Senior — the Junior is the youth futsal ball (Select)
Durable PU surface with a textured pattern (Select)
FIFA Basic approved, one-year warranty (Select)
These are the manufacturer’s own claims, not measurements we took.
The ball is the half of indoor play that decides whether it is allowed to continue, and the goal is the easy half. If you still need something to shoot at, the indoor goal picks are sized by room rather than by age — and the top pick there ships with a foam ball, which solves both halves in one box.
If your player is in an actual futsal league rather than a general indoor program, best futsal balls for kids is the narrower page: it works from the published futsal ball specification and the age-to-size table, and it deliberately excludes the felt-covered indoor balls ranked here. For a cheaper outdoor ball to go alongside it, best soccer balls under $25 is the recreational band.
Common questions
What size ball for indoor soccer for kids?+
For proper futsal, use futsal sizing rather than outdoor sizing: futsal junior (often marked size 3) for players under 13, and futsal senior (size 4) for 13 and up. Select labels its Jinga range Junior and Senior rather than by number, which is the clearest way through it.
What is the difference between a futsal ball and a soccer ball?+
A futsal ball has a deliberately low bounce, achieved by filling the bladder with material that kills the rebound, and it is heavier for its diameter. That keeps the ball on the floor of a hard court in a small space, which is why futsal develops close control so effectively. An outdoor ball on a futsal court spends the session in the air.
Can you use a regular soccer ball indoors?+
On indoor turf, usually yes — many indoor turf programs use ordinary outdoor balls because the surface behaves more like grass. For proper futsal on a hard court, no: a normal ball bounces too much to play with, and the league will generally specify a futsal ball.
Are futsal balls good for practice outdoors?+
Not really. The low-bounce construction that makes them excellent on a court makes them heavy and dead on grass, and the strike does not translate well. Keep the futsal ball for indoors and use an age-appropriate outdoor ball outside.
Do you need special shoes for indoor soccer as well?+
Yes. Indoor facilities require a flat non-marking gum sole, and a turf shoe is usually refused at the door because the nubs mark a sports floor. That makes indoor shoes a separate pair from both cleats and turf shoes — see the indoor shoe picks.
Sources
Select Sport — futsal balls — Select's futsal range including the Junior and Senior Jinga models, and Select's own description of the low-bounce bladder construction.
