What Size is Under Armour Youth Medium?

Trying to figure out what size you or your child needs in Under Armour clothes? Here is a size chart to help you make your decision!

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Sizing for Youth

With the many different size options for clothing, it can be difficult to determine what will fit. When looking for youth sized items, it is important to know a few key measurements. The chest width is the most important factor to consider for a snug fit with a shirt. The next measurement to keep in mind is the sleeve length. You’ll want to make sure the sleeves aren’t too long or too short. Lastly, take note of the inseam for pants. This will ensure the right length for a comfortable fit.

Chest Size

In order to find the right size, it is important to know the measurements of both the chest and the waist. The chest is measured by starting at the armpit and going around the body. For the waist, start at the belly button and measure around.

Size Chest (in) Waist (in)
Under Armour Youth Medium 28-30 23-25

Waist Size

For the waist size, you will want to measure your child around the belly button. Have them stand up straight and breathe normally. Run the measuring tape around their waist, making sure that it is level with the ground all the way around. You can also find child-specific size charts on our product pages that include measurements for both boys and girls.

Under Armour Youth Sizing

Under Armour Youth sizes are based on height and weight. The size chart below will help you find the right size for your child. Keep in mind that Under Armour’s youth sizes run small, so you may want to order a size up.

Under Armour Youth Tops

Under Armour Youth Tops are available in sizes Small to Large. Each size is designed to fit children of specific ages.

Size Age Range
Small 4 – 6 years
Medium 7 – 8 years
Large 9 – 10 years

To find the right size for your child, use our Under Armour Size Chart which includes tops, bottoms and outerwear sizing.

Under Armour Youth Bottoms

Build the perfect foundation for any workout with Under Armour youth bottoms. Choose from a variety of styles, including youth shorts, leggings and joggers, to find the right fit for your young athlete. UA youth bottoms are available in a range of sizes, so you can find the right fit for your child.

Under Armour offers sizing charts on its website to help you find the right fit for your child. If you’re not sure which size to choose, err on the side of larger rather than smaller. Under Armour youth clothing is designed to fit snugly but not tightly, so it won’t restrict movement or be uncomfortable during extended wear.

If you have any questions about Under Armour youth sizing, please feel free to contact us and we’d be happy to help.

Other Considerations

When shopping for youth clothing, it is important to take into account a few different factors in order to ensure you are getting the best fit possible. In addition to taking measurements, you should also consider the style of the clothing, the intended activity, and any other special considerations. With that in mind, let’s take a closer look at Under Armour youth medium sizing.


There are a few other things to consider when purchasing clothing, such as height and weight. If you are on the taller side, you may want to purchase a size up in order to ensure that the clothing will fit you properly. The same goes for if you are on the heavier side; you may want to purchase a size up in order to ensure that the clothing will not be too tight.


The best way to know what size you need is to weigh yourself. You can use a household scale or go to a fitness center that has public scales. If you want to be more precise, you can also measure your body fat percentage. However, this isn’t necessary and is only recommended for people who are very serious about their fitness goals.