There is no one size fits all approach when it comes to picking youth jerseys. Different brands, different sports, and different kids all have unique sizing considerations.
So how do you pick which size to buy? We want to make your decision process as easy as possible. See our youth jersey size charts and get our best measurement tips for the optimal fit.

Why Jersey Sizing Is Important for Youth Teams
The right uniform elevates a sports team, creating a sense of camaraderie and allowing athletes to perform their best. In youth sports, the right sizing:
- Makes athletes comfortable: Athletes do not have to deal with chafing, exposure, or pinching when they have the right size uniform. It gives them one less detail to worry about when they compete.
- Enables full mobility for performance: Uniforms that are too tight can restrict movement, while uniforms that are too loose can get in the way. The right fit will ensure optimal athletic performance.
- Creates cohesive team appearance: Team solidarity can be a huge performance factor for young athletes. When they look like a team, they are better able to connect and play well together.
When all of these factors come together, athletes can focus on enjoying the game.
How to Understand Youth Jersey Size Charts
Youth sizing differs from adult sizing. In many brands, youth sizes are unisex rather than gendered. Even in cases with boys and girls sizing options, youth sizing takes into account the unique needs of growing kids. Youth sizes may have more in-between sizing options but fewer extended plus sizes.
Many brands have three types of fit for apparel sizes, which you should take into account when picking size options:
- Tight, a skin-tight option for locked-in support
- Slim, a close-to-the-skin option for streamlined mobility
- Standard, a fuller cut for ease of wear and breathability
See how youth jerseys from gearUP fit with our sizing guide, NIKE size chart, and Under Armour size chart.
How to Measure Youth Athletes for Uniforms
Once you have consulted a sizing chart, you will need an athlete’s measurements to order the correct size. Note whether measurements should be in inches or centimeters, based on the brand or company you will be ordering from.
For youth athletes, you should measure their:
- Chest: Measure at the fullest part of the chest
- Waist: Measure around the narrowest part of the abdomen
- Hips: Measure around the fullest part of the hips
- Height: Measure while standing up straight
Below is Nike’s Youth sizing chart for reference:
As you take measurements, watch out for common mistakes such as:
- Pulling the tape measure too tight
- Measuring over layers
- Holding the tape measure at an angle
To get accurate numbers, all measurements should be taken with the tape measure kept horizontal. If your athlete’s measurements are between sizes, order the larger size for a slightly looser fit they can grow into.

What to Consider When Selecting a Youth Uniform Size
A child’s current, exact measurements are not the only factor to consider when ordering sports uniforms. Player preferences, game-day conditions, and childhood changes all impact the fit of a jersey. When picking a size, consider:
- Layering potential: Not all sports or apparel options allow for layering. However, if your athlete is likely to layer their clothing, consider a looser fit so the uniforms have room for preferred undergarments.
- Future growth spurts: Kids grow! A tight fitting uniform has less flexibility for changes. If your child is at the right age for a growth spurt, consider a looser option for longer-lasting fit.
- Athlete preferences: Some athletes like a tighter fit, while others want a little more room to breathe. Consider your child’s age, sport, and typical clothing style when choosing uniform sizing.
Always consult with your athlete when ordering uniforms so you can take their preferences and knowledge into account. If you are less familiar with your child’s sport, coaches, teammates, and other parents can also give you advice.
Easy Uniform Ordering with gearUP
You can easily find the right fit for any jersey by looking at size charts and finding proper measurements. With growing kids, you may have to size up or buy new jerseys mid-season. At gearUP, we make ordering any uniform simple.
We put together a team shop with apparel that has your team designs available across a variety of momentec brands, NIKE, and Under Armour. Then any parent or athlete can order items throughout the season, with each item shipped directly to them. This allows you to order replacements or new sizes at any time. We also offer sizing insurance for cases that need more flexibility. Learn more about our process.
Ready to gearUP? Get started with an account representative today or hear from other teams who love working with us.
The information provided on this blog is for general informational purposes only. While we strive to keep the content accurate and up-to-date, we make no representations or warranties regarding the accuracy, completeness, or reliability of the information. Please contact our team for personalized advice regarding your youth sports uniform needs.







