JA 4 EP BASKETBALL SHOES
Ja’s elevation is pure hang-time horror, and the Ja 4 packs the bounce that creates unguardable nightmares. Responsive Cushlon 3.0 foam delivers explosive lift and cushions every landing. Its sleek containment system pairs with a supportive upper to help you stay locked in and ready to terrorize any defender in your wake. With its extra-durable rubber outsole, this version gives you traction for outdoor courts.
A lightweight and responsive SPRPWR sockliner sits on top of our bouncy Cushlon 3.0 foam for optimal cushioning for those rim-rattling verticals.
The lightweight and durable foam upper provides support for quick moves, and a textured haptic overlay adds dimension and durability. The JA-frame wraps around the midfoot to help keep you contained for extra stability while staying shifty.
The durable rubber outsole with a logo-inspired traction pattern grips the court like you own it so you can play fast and fearless.
Ja’s words live under every step. His words of “If you are down there” are molded into the outsole, and “I don’t only have motion where my feet are at, it’s global” is seen on side of the JA-frame.
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STORE LOCATIONS
FIND YOUR SIZE
NIKE
FOOTWEAR
| US - MEN'S | US - WOMEN'S | US - KIDS | UK | CM | EU |
| 3.5 | 5 | 3.5Y | 3 | 22.5 | 35.5 |
| 4 | 5.5 | 4Y | 3.5 | 23 | 36 |
| 4.5 | 6 | 4.5Y | 4 | 23.5 | 36.5 |
| 5 | 6.5 | 5Y | 4.5 | 23.5 | 37.5 |
| 5.5 | 7 | 5.5Y | 5 | 24 | 38 |
| 6 | 7.5 | 6Y | 5.5 | 24 | 38.5 |
| 7 | 8.5 | 7Y | 6 | 25 | 40 |
| 7.5 | 9 | 7.5Y | 6.5 | 25.5 | 40.5 |
| 8 | 9.5 | 8Y | 7 | 26 | 41 |
| 8.5 | 10 | 8.5Y | 7.5 | 26.5 | 42 |
| 9 | 10.5 | 9Y | 8 | 27 | 42.5 |
| 9.5 | 11 | 9.5Y | 8.5 | 27.5 | 43 |
| 10 | 11.5 | 10Y | 9 | 28 | 44 |
| 10.5 | 12 | 10.5Y | 9.5 | 28.5 | 44.5 |
| 11 | 12.5 | 10 | 29 | 45 | |
| 11.5 | 13 | 10.5 | 29.5 | 45.5 | |
| 12 | 13.5 | 11 | 46 | ||
| 12.5 | 14 | 11.5 | 30.5 | 47 | |
| 13 | 14 | 11.5 | 30.5 | 47 | |
| 13.5 | 15 | 12.5 | 31.5 | 48 | |
| 14 | 15.5 | 13 | 32 | 48.5 | |
| 14.5 | 16 | 13.5 | 32.5 | 49 | |
| 15 | 16.5 | 14 | 33 | 49.5 | |
| 15.5 | 17 | 14.5 | 33.5 | 50 | |
| 16 | 17.5 | 15 | 34 | 50.5 | |
| 16.5 | 18 | 15.5 | 34.5 | 51 | |
| 17 | 18.5 | 16 | 35 | 51.5 | |
| 17.5 | 19 | 16.5 | 35.5 | 52 | |
| 18 | 19.5 | 17 | 36 | 52.5 | |
| 18.5 | 20 | 17.5 | 36.5 | 53 | |
| 19 | 20.5 | 18 | 37 | 53.5 | |
| 19.5 | 21 | 18.5 | 37.5 | 54 | |
| 20 | 21.5 | 19 | 38 | 54.5 | |
| 20.5 | 22 | 19.5 | 38.5 | 55 | |
| 21 | 22.5 | 20 | 39 | 55.5 | |
| 21.5 | 23 | 20.5 | 39.5 | 56 | |
| 22 | 23.5 | 21 | 40 | 56.5 | |
| 11 | 12.5 | 10 | 29 | 45 |
MEN'S APPAREL
The measurements on the size chart are body measurements.
FIT TIPS
If you're on the borderline between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit.
HOW TO MEASURE
BUST: Measure around the fullest part of your bust, keeping the measuring tape horizontal.
WAIST: Measure around the narrowest part (typically where your body bends side to side), keeping the tape horizontal.
HIPS: Measure around the fullest part of your hips, keeping the tape horizontal.
MEN'S TOPS
| SIZE | CHEST(IN) | WAIST(IN) | HIP(IN) | HEIGHT(IN) |
| XS | 35.2-35 | 26.29 | 32.5-35 | 5'7"-6'0" |
| XS | 35-37.5 | 29-32 | 35-37.5 | 5'7"-6'0" |
| M | 37.5,41 | 32-35 | 37.5-41 | 5'7"-6'0" |
| L | 41-44 | 35-38 | 41-44 | 5'7"-6'0" |
| XL | 44-48.5 | 38-43 | 44-47 | 5'7" |
| 2XL | 48.5-53.5 | 43-47.5 | 47-50.5 | 5'7"-6'0" |
| 3XL | 53.5-58 | 47.5-52.5 | 50.5-53.5 | 5'7"-6'0" |
| 4XL | 58-63 | 52.5-57 | 53.5-58.5 | 5'7"-6'0" |
MEN'S BOTTOMS
| SIZE | WAIST(IN) | HIP(IN) | LEG LENGTH(IN) | HEIGHT(IN) |
| XS | <29 | <35 | <32.25 | 5'7"-6'0" |
| S | 29-32 | 35-37.5 | 32.25 | 5'7"-6'0" |
| M | 32-35 | 37.5-41 | 32.5 | 5'7"-6'0" |
| L | 35-38 | 41-44 | 32.75 | 5'7"-6'0" |
| XL | 38-43 | 44-47 | 33 | 5'7" |
| 2XL | 43-47.5 | 47-50.5 | 33.25 | 5'7"-6'0" |
| 3XL | 47.5-52.5 | 50.5-53.5 | 33.5 | 5'7"-6'0" |
| 4XL | 52.5 | 53.5-58.5 | 33.75 | 5'7"-6'0" |
WOMEN'S APPAREL
The measurements on the size chart are body measurements.
FIT TIPS
If you're on the borderline between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit.
HOW TO MEASURE
BUST: Measure around the fullest part of your bust, keeping the measuring tape horizontal.
WAIST: Measure around the narrowest part (typically where your body bends side to side), keeping the tape horizontal.
HIPS: Measure around the fullest part of your hips, keeping the tape horizontal.
WOMEN'S TOPS
| SIZE | BUST(IN) | WAIST(IN) | HIP(IN) |
| XXS | 27.5-29.5 | 21.5-23.5 | 30.5-33 |
| XS | 29.5-32.5 | 23.5-26 | 33-35.5 |
| S | 32.5-35.5 | 26-29 | 35.5-38.5 |
| M | 35.5-38 | 29-31.5 | 38.5-41 |
| L | 38-41 | 31.5-34.5 | 41-44 |
| XL | 41-44.5 | 34.5-38.5 | 44-47 |
| 2XL | 44.5-48.5 | 38.5-42.5 | 47-50 |
| 1X | 45-49 | 41-45 | 46-50 |
| 2X | 49-53 | 45-49 | 50-54 |
| 3X | 53-57 | 49-53 | 54-58 |
WOMEN'S BOTTOMS
| SIZE | WAIST(IN) | HIP(IN) | HEIGHT |
| XXS | 21.5-23.5 | 30.5-33 | 5'4"-5'8" |
| XS | 23.5-26 | 33-35.5 | 5'4"-5'8" |
| S | 26-29 | 35.5-38.5 | 5'4"-5'8" |
| M | 29-31.5 | 38.5-41 | 5'4"-5'8" |
| L | 31.5-34-5 | 41-44 | 5'4"-5'8" |
| XL | 34.5-38.5 | 44-47 | 5'4"-5'8" |
| 2XL | 38.5-42.5 | 47-50 | 5'4"-5'8" |
| 1XL | 41-45 | 46-50 | 5'4"-5'8" |
| 2X | 45-49 | 50-54 | 5'4"-5'8" |
| 3X | 49-53 | 54-58 | 5'4"-5'8" |
SPORTS BRAS
| BAND/CUP SIZE | ALPHA SIZE |
ALPHA/CUP SIZE
|
| 30A-30C | XS | XS(AC) |
| 30D-30E | XS | |
| 32A-32B | XS | XS(A-C) |
| 32C | S | S(A-C) |
| 32D-32E | S | S(D-E) |
| 34A-34C | S | S(A-C) |
| 34D-34E | M | M(D-E) |
| 36A-36C | M | M(D-E) |
| 36D-36E | L | L(D-E) |
| 38A-38C | L | L(A-C) |
| 38D-38E | XL | XL(D-E) |
| 40A-40C | XL | XL(A-C) |
| 40D-40E | 2XL | XL(D-E) |
| 42A-42C | 1X | |
| 42D-42E | 2X | |
| 44A-44C | 2X | |
| 44D-44E | 3X |
KIDS APPAREL
The measurements on the size chart are body measurements.
FIT TIPS
If you're on the borderline between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit.
HOW TO MEASURE
BUST: Measure around the fullest part of your bust, keeping the measuring tape horizontal.
WAIST: Measure around the narrowest part (typically where your body bends side to side), keeping the tape horizontal.
HIPS: Measure around the fullest part of your hips, keeping the tape horizontal.
| SIZE | NUMERIC SIZE | AGE | HEIGHT(IN) | CHEST(IN) | WAIST(IN) |
| XS | 6-7 | 7-8 | 48-50 | 25.5-26 | 23.5-24 |
| S | 8-9 | 8-10 | 50-54 | 26-27 | 24-25.5 |
| S+ | 8-9 Plus | 8-10 | 50-54 | 28-30 | 26-28 |
| M | 10-12 | 10-12 | 54-58 | 27-29.5 | 25.5-27 |
| M+ | 10-12 Plus | 10-12 | 54-58 | 30-33 | 28-30 |
| L | 14-16 | 12-13 | 58-62 | 29.5-32 | 27-28.5 |
| L+ | 14-46 Plus | 12-13 | 58-62 | 33-36 | 30-32 |
| XL | 18-20 | 13-15 | 62-67 | 32-35 | 28-5-29.5 |
| XL+ | 18-20 Plus | 13-15 | 62-67 | 36-38.5 | 32-34.5 |
| SIZE | NUMERIC SIZE | AGE | HEIGHT(IN) | CHEST(IN) | WAIST(IN) |
| XS | 6-7 | 7-8 | 48-50 | 25.5-27 | 23.5-24 |
| S | 8-9 | 8-10 | 50-54 | 27-29 | 24-25 |
| S+ | 8-9 Plus | 8-10 | 50-54 | 29-32 | 26.5-29.5 |
| M | 10-12 | 10-12 | 54-57 | 29-31 | 25-27 |
| M+ | 10-12 Plus | 10-12 | 54-57.5 | 32-34.5 | 29.5-32 |
| L | 14-16 | 12-13 | 57-61 | 31-33.5 | 27-28 |
| L+ | 14-46 Plus | 12-13 | 57.5-61.5 | 34.5-38 | 32-35 |
| XL | 18-20 | 13-15 | 61-65 | 33.5-36.5 | 28-29.5 |
| XL+ | 18-20 Plus | 13-15 | 61.5-65.5 | 38-41.5 | 35-39 |
LITTLE KIDS' CLOTHING
| SIZE | NUMERIC SIZE | AGE | HEIGHT(IN) | CHEST(IN) | WAIST(IN) |
| XS | 4 | 3-4 | 38.5-41 | 22-23 | 21.5-22 |
| S | 5 | 4-5 | 41-43 | 23-24 | 22-22.5 |
| M | 6 | 5-6 | 43-46 | 24-24.75 | 22.5-23 |
| L | 6X/7 | 6-7 | 46-48 | 24.5-26 | 23-24 |
| XL | 7X | 7-8 | 48-50.5 | 26-27 | 24-25 |
EQUIPMENT
The measurements on the size chart are body measurements.
FIT TIPS
* If you're on the borderline between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit.
* OS = One Size.
HOW TO MEASURE
Measure the circumference of your head using a measuring tape. Wrap it around your head at the point where the hat will sit (about an inch/2.5cm above your eyebrows).
| SIZE | US - MEN'S | US - WOMEN'S | US KIDS | UK | EU |
| XS | 13C-3Y | 31-35 | |||
| S | 4-6 | 3Y-5Y | 2-5 | 34-38 | |
| M | 6-8 | 6-10 | 5Y-7Y | 5-8 | 38-42 |
| L | 8-12 | 10-13 | 8-11 | 42-46 | |
| XL | 12-15 | 11-14.5 | 46-50 |
HATS AND HEADWEAR
| Nike Hat Size | Head Size | Alpha Size | Swosh Flex | Unisex | Women's | Dual Size Unisex | Women's |
| 6 1/2 | 20 1/2 | XS | S | ||||
| 6 5/8 | 20 7/8 | XS/S | XS | S OS | S/M | ||
| 6 3/4 | 21 1/8 | XS | XS/S | XS S OS | S OS | S/M | |
| 6 7/8 | 21 1/2 | XS/S S/M | XS S OS | S OS | XS/S | ||
| 7 | 21 7/8 | S | XS/S S/M | XS S OS | S OS | M/L | |
| 7 1/8 | 22 1/4 | S/M M/L OS | XS S OS | S OS | S/M | ||
| 7 1/4 | 22 5/8 | M | S/M M/L OS | S OS | OS L | L/XL | |
| 7 3/8 | 23 | M/L L/XL OS | S OS XL | OS L | M/L | ||
| 7 1/2 | 23 1/2 | L | M/L L/XL OS | OS XL | L | ||
| 7 5/8 | 23 7/8 | L/XL XL/XXL | OS XL | L | |||
| 7 3/4 | 24 1/4 | XL | L/XL XL/XXL | XL | L | ||
| 7 7/8 | 24 5/8 | XL | L | XL/XXL | |||
| 8 | 25+ | XL |