Kids sizes vary a lot with each year of age, so taking a big average is hard. Especially when worldwide statistics are lumped together. Choose your size where you fit in best.

These guidelines matter less and less with age, because when kids start getting stronger around 13 years old, their strength and skill will overcome the usual limitations associated with being small. Deck size then becomes more a matter of preference, depending on your type of skateboarding.

Since the wheelbase mostly dictates the quickness and ease of movement of a deck, the overall length of the board is probably the biggest factor in choosing the right deck. Your natural stance over that wheelbase, as well as the leverage you can muster, correlate largely with your height. All too often, kids ride oversized boards, looking like they're doing the splits, and work way too hard just to raise the front truck.

The mid-sizes, minis and micros have proportionately smaller widths and concaves, which are tailored to give them the same basic feel across the deck as the big kids feel riding normal size decks.

full size	mid size	mini	micro
Deck Size: 7.4" x 30.8" or bigger	Deck Size: 7.3" x 29"	Deck Size: 7" x 28"	Deck Size: 6.5" x 27.2" 6.75" x 27.6"
Height: 5'3" (~160cm) or bigger	Height: 4'5" - 5'2" (~130cm - 160cm)	Height: 3'5" - 4'4" (~102cm - 130cm)	Height: under 3'4" (~102cm)
Age Range: 13 years or older	Age Range: 9 - 12 years old	Age Range: 6 - 8 years old	Age Range: 5 years or younger
Shoe Size: 9 and up	Shoe Size: 7 - 8	Shoe Size: 4 - 6	Shoe Size: 3 or smaller