Kids Sportswear Size Guide by Age (2–14)

If you've ever ordered what a kids sportswear size chart says is a "7-8" and had it arrive either swimming on your child or stopping two inches above the waistband, you already know why a proper kids sportswear size guide matters more than it does for ordinary clothing. Activewear has to fit through a full range of motion - a sprint, a stretch, a squat, a throw - and a size label that's off by even one increment shows up immediately on the pitch or the mat, not just in the mirror.

This guide walks through the full kids sportswear size chart by age, exactly how to measure your child at home in under five minutes, and the specific sizing differences between boys' activewear and girls' activewear that most parents don't find out until after the first order arrives.

Why Kids' Sportswear Sizing Works Differently From Regular Clothing

Regular kidswear is usually cut for a relaxed fit - a bit of extra room reads as "room to grow." Sportswear is cut closer to the body on purpose, because loose fabric catches underfoot during a sprint, bunches up under a backpack strap, or restricts a full arm swing during a throw. That's why an 8-year-old who wears a size 9-10 in school shirts might genuinely need a 7-8 in a football jersey or a training tee.

The other factor is fabric. Stretch fabrics such as those used in leggings and base layers are meant to sit closer to the skin than woven cotton, so their size charts run slightly differently from a plain t-shirt. Keep both of these in mind before assuming your child's "usual" size from another store carries over directly to activewear.

The Full Kids Sportswear Size Chart by Age (2-14)

Use this chart as your starting point, then confirm with the at-home measurements below. Age is a guide, not a guarantee - a child's height and chest measurement are what actually decide the right size.

Toddler and Preschool Sizes (2-5 Years)

At this age, sizing is driven almost entirely by height rather than chest or waist, since body proportions are still changing quickly. A size that fits the chest snugly may already be short in the body by the time a child reaches the top of an age bracket - if your toddler is tall for their age, size up rather than trying to stretch a season out of a size that already fits tight.

Primary School Sizes (6-9 Years)

This is where chest measurement starts to matter as much as height, particularly for football jerseys, basketball tanks, and fitted training tees. A child who's average height but broad through the shoulders may need to size up from the height-based recommendation to avoid a tight fit across the chest during a throw or a reach.

Tween Sizes (10-14 Years)

From age 10 up, girls' and boys' proportions start to diverge more noticeably, which is exactly where sizing complaints spike if a parent buys by age alone rather than checking the chart. This is the range where taking two minutes to measure properly saves the most returns.

How to Measure Your Child for Sportswear at Home

You only need a soft tape measure and about five minutes. Do this in light clothing, standing naturally rather than pulled in tight.

Measuring Height

Have your child stand barefoot against a wall, heels touching the baseboard, looking straight ahead. Mark the wall level with the top of the head and measure from the floor to the mark.

Measuring Chest

Wrap the tape measure under the arms, around the fullest part of the chest, keeping it level front and back. It should sit snug enough to stay in place without compressing - if you can't slide two fingers under it, it's too tight to give an accurate reading.

Measuring Waist

Measure at the natural waistline - just above the hip bones, roughly where a drawstring would sit. This number matters most for shorts, leggings, and tracksuit bottoms rather than tops. For a drawstring style such as the Boys Knee-Length Sports Shorts, the waist reading is the one that decides the size, not height.

Reading Three Measurements Against One Size Bracket

Once you have height, chest, and waist, match each one to the chart separately - don't assume they'll all point to the same size. If your child's height matches an 8-9 but their chest measurement matches a 10-11, that's a genuine signal to size up rather than a measuring error, particularly for anything built to move through a full range of motion.

What to Do When Your Child Is Between Two Sizes

For activewear specifically, the safe default is to size up rather than down. A slightly loose training tee still allows a full sprint or stretch; a tight one restricts movement and wears through faster at the seams from the extra tension. The one exception is compression-style leggings and base layers, which are designed to fit close - for those, match the chest and waist measurement as closely as the chart allows rather than sizing up out of habit.

Sizing Differences Between Boys' and Girls' Activewear

Boys' and girls' cuts aren't simply the same block in different colours. Girls' tops are typically cut with a narrower shoulder line and a slightly closer waist, while boys' tops carry a bit more room through the shoulders and chest for the same height. This is most noticeable from around age 8 onward - a pair of twins the same height may need different sizes once you're shopping boys' sportswear versus girls' sportswear rather than a unisex size. For a real example, a piece like the Boys Performance T-Shirt is cut with more shoulder room than the equivalent girls' style.

Girls' Leggings, Skirts and Shorts Rise

Girls' bottoms tend to run with a slightly higher rise than boys' shorts, which matters for comfort during floor work in gymnastics or stretching, as seen on pieces like the Girls Sport Leggings. A pleated style such as the Girls Pleated Sport Skirt sits on the natural waist with an inner short, so the waist measurement rather than height decides the size. If you're buying for siblings of different genders in the same age bracket, treat each as its own sizing decision rather than assuming one chart covers both.

Sizing for School PE Kit Compared With Club Training Kit

These two are often bought as separate purchases but don't need different logic. A school PE kit gets worn for a 40-minute lesson and needs to survive being stuffed in a bag - comfort and durability matter more than a competition-tight fit. Club training kit, worn for 60-90 minutes of continuous movement, benefits from a slightly closer fit and breathable fabric that manages sweat over a longer session.

If you're kitting out for both at once, a practical approach is one properly measured size across a small rotation - two tees, a pair of shorts, and a matching set from the sports uniforms range - rather than buying oversized "to grow into" pieces that compromise fit for both settings. A well-fitted boys' or girls' training top in the right size will still fit comfortably for a full school term before the next growth spurt.

Egyptian Sizing, September Term Dates and the Cairo Heat

Two things specific to buying kids' sportswear in Egypt are worth planning around. The first is the school calendar: the academic year opens at the end of September, and PE lessons begin within the first fortnight. Measuring in late August rather than mid-September gives you a reading taken after the summer growth spurt, which is when children typically gain the most height in a single stretch.

Why Cairo's September Temperatures Change the Fit You Want

The second is climate. September and October in Cairo and the Delta regularly sit in the mid-thirties through the afternoon, which is exactly when most school PE lessons and club sessions run. In that heat a close-fitting cotton tee holds sweat and clings, so for the first two months of term a slightly looser cut in a breathable fabric from the gym and training range is more comfortable than the fitted size the chart alone would suggest. From December through February, when early-morning training in Cairo can drop near 10°C, the same child is layering a long-sleeve top underneath - so leave enough room in the outer layer for a base layer beneath it rather than buying both to fit exactly.

Egyptian Age Labels Against European Height Labels

Locally made kids' sportswear in Egypt is usually labelled by age bracket, while imported European stock is labelled by height in centimetres (110, 122, 134, 146). They don't always line up: a European 128 covers roughly the same child as an Egyptian 8-9, but the European cut tends to run slimmer through the chest. If you are mixing local and imported pieces in one wardrobe, convert everything to your child's actual height and chest measurement in centimetres first and buy from that, not from the age on the label.

Common Sizing Mistakes Parents Make

• Buying a size up "to grow into it" - a shirt two sizes too big restricts movement now and only fits properly for a few weeks before it's finally sized right, wasting most of its useful life.
• Going by age alone - age ranges are averages; two children of the same age can differ by a full size bracket in height or chest.
• Not accounting for fabric type - a stretch legging and a woven cotton short at the "same" size will fit differently on the body.
• Skipping the waist measurement for bottoms - chest and height don't tell you enough about how shorts or leggings will actually sit.
• Assuming all brands size the same - always check the specific chart for the brand you're buying, not a general size guide from memory.
• Measuring over a thick winter layer - take the reading in light clothing, or the chest number comes back two to three centimetres high.

How Fabric Affects Fit and Sizing

A four-way stretch fabric, common in leggings and compression tees, moves with the body and can be sized closer to the measurement without restricting motion. A woven cotton-blend fabric, used in more relaxed training tees and shorts, doesn't stretch the same way, so a snug fit in cotton will feel tighter during activity than the same snugness in a stretch fabric. Across the kids' t-shirts range you'll find both constructions, and the fit notes on each product say which one you're looking at. When in doubt between two sizes, size up for woven fabrics and stick to the measured size for stretch fabrics.

When to Size Up and When to Size Down

Size up when: your child is between sizes on the chart, the item is a woven fabric rather than stretch, or it's being bought for a sport with a lot of throwing or reaching motion. Size down (or stick to the measured size) when: the item is compression-style stretch fabric, it's a base layer meant to sit close to the skin, or your child's measurements sit clearly within one bracket rather than between two.

Anja's Size Guarantee and Exchange Policy

Sizing exchanges are, by a wide margin, the most common request we get - which is exactly why we keep the process simple. If a piece doesn't fit after using this guide, reach out and we'll sort a straightforward exchange for the correct size, so getting it right the first time isn't the only chance you get.

Frequently Asked Questions

What is the best way to use a kids sportswear size guide when my child is tall for their age?
Prioritise the height measurement first and the chest measurement second. If the two point to different sizes on the chart, choose the larger of the two for both tops and bottoms.

Do Anja's sizes run true to the chart above?
Yes - this chart matches our own product size labels exactly, so you can buy directly from it rather than estimating.

How often should I re-measure my child for sportswear?
Roughly every school term for children under 10, and every four to six months for tweens, since growth rate varies most noticeably around those ages. In Egypt the most useful single check is late August, just before the school year opens at the end of September.

What if a size still doesn't fit after washing?
Our exchange policy covers this exact situation - sizing exchanges are processed quickly since it's the single most common reason customers get in touch.

Is there a difference in sizing between football jerseys and everyday training tees?
Yes - match-day jerseys are sometimes cut slightly closer than everyday training tees, so check the specific product's fit notes alongside this general size chart.