What size soccer goal do I need?

Gone are the days when FIFA required all soccer goals to be 8' high x 8 yards wide!  It was just too much to ask for a 10-year-old or 9-year-old Goal Keeper to defend a soccer goal higher than he/she can jump and touch.  Most U-10 Goal Keepers can't touch 8' high, let alone deflect or catch a soccer ball at that height.  Many U-12 Goal Keepers can't defend the full 8' high goal.  Goal width is another consideration.  The younger Goal Keepers have difficulty defending the entire 24 feet width, they just don't have the speed to cover that much area.

Today, soccer goals may be downsized to match the size of the youth players. The chart below shows the recommended goal sizes for youth players.

Model                 League Designation     Age Group(s)      Goal Size(HxW)
DM2400, P2400  International Adult       U13, U12          8'H x 24'W
DM2100, P2100  US Junior Standard     U12, U11          7'H x 21'W
DM1800, P1800  US Modified               U11, U10, U9  6.5H' x 18.6'W
DM1600              CDN Junior Standard  U11, U10, U9  6.5'H x 16.5'W
DM1200              Official Indoor             U9, U8,            6.5'H x 12'W
DM600                3v3 Soccer                 U6                    4'H x 6'W

What model does the league your youth team is playing in use?  Is it the size recommended in the chart?
Do different age groups use the same field?  If so, are the goal sizes changed from one age group to the next?
Can you change the size of the soccer goal if needed?

Many of the portable soccer goals can be adjusted to the size needed for league.