Girls' bras

    Refer to the ribcage (underbust) measurements in the chart below to help find the right size and the perfect bra. Scroll horizontally to see more sizes.

    Size chart (XS–1X)
    SizeXSSMLXL
    Numeric Size6 - 78 - 910 - 1214 - 1618 - 20
    Underbust (in)24.5 - 25.526 - 2727.5 - 28.529 - 30.531 - 32.5
    Size chart (Extended Sizes)
    SizeS+M+L+XL+
    Numeric Size8 - 9 Plus10 - 12 Plus14 - 16 Plus18 - 20 Plus
    Underbust (in)26.5 - 28.529 - 3131.5 - 33.534 - 36

    How to measure

    1. Measure underbust

    Holding a soft tape measure horizontally, pull it all the way around the ribcage just below the chest (also known as the underbust). The tape measure should feel snug.

    2. No tape measure?

    Grab a string (or even a shoelace), a pen and a ruler. Pull the string around the ribcage horizontally just below the chest—similar to using a tape measure—and use the pen to mark where one end of the string meets the other side. Then, lay the string on a flat surface and use a ruler to determine the underbust measurement.

    3. To find the bra size …

    Use the chest measurement from steps 1 or 2 to find the bra size on the chart at the top of the screen. If the measurement falls between sizes on the chart, opt for the larger size—a slightly larger bra will be more comfortable than a bra that's too tight.
    *Extended-size (+) sports bras differ only in circumference, not length or style.

    Three tips for finding the right fit

    1. Start with straps

    Two fingers should fit between the strap and the body. If it's too loose, try a smaller size. If it feels or looks like it's digging into the shoulders, go up a size.

    2. Check the band

    Make sure the band isn't too tight—two fingers should fit comfortably between the band and the body. Also, raise arms over the head to make sure the band doesn't ride up—it should fit straight across the ribs.

    3. Jump without bounce

    Go ahead … jump! There should be minimal bounce in the chest area when jumping, and the chest should feel covered and secure. If there is too much bounce to move around comfortably or there is spillage at the underarm or neckline, try a women's-size bra.

    Finding the right Nike sports bra

    Need a little extra help? Check out some of our other bra resources to find the perfect style.

    How to measure

    1. Measure underbust

    Holding a soft tape measure horizontally, pull it all the way around the ribcage just below the chest (also known as the underbust). The tape measure should feel snug.

    2. No tape measure?

    Grab a string (or even a shoelace), a pen and a ruler. Pull the string around the ribcage horizontally just below the chest—similar to using a tape measure—and use the pen to mark where one end of the string meets the other side. Then, lay the string on a flat surface and use a ruler to determine the underbust measurement.

    3. To find the bra size …

    Use the underbust measurement from steps 1 or 2 to find the bra size on the size chart above. If the measurement falls between sizes on the chart, opt for the larger size—a slightly larger bra will be more comfortable than a bra that's too tight. *Extended-size (+) sports bras differ only in circumference, not length or style.

    Three tips for finding the right fit

    1. Start with straps

    Two fingers should fit between the strap and the body. If it's too loose, try a smaller size. If it feels or looks like it's digging into the shoulders, go up a size.

    2. Check the band

    Make sure the band isn't too tight—two fingers should fit comfortably between the band and the body. Also, raise arms over the head to make sure the band doesn't ride up—it should fit straight across the ribs.

    3. Jump without bounce

    Go ahead … jump! There should be minimal bounce in the chest area when jumping, and the chest should feel covered and secure. If there is too much bounce to move around comfortably or there is spillage at the underarm or neckline, try a women's-size bra.

    Compare styles

    Girls' Sports Bra Size Chart

    Nike Swoosh Bra

    Compressive fit provides a held-in feel for added support during higher-impact activities.

    Girls' Sports Bra Size Chart

    Nike One Bra

    Lightweight, stretchy fabric and a snug elastic band provide a just-right fit that feels barely there. The high neckline offers extra coverage.

    Girls' Sports Bra Size Chart

    Nike Indy Bra

    Thin straps, a V-shaped back and soft, smooth fabric provide comfort while keeping up with her style.

    Girls' Sports Bra Size Chart

    Nike Alate Bra

    An extra layer of mesh fabric across the chest helps provide a smooth fit. Soft, stretchy fabric feels like a second skin.