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What Size Is a 10/12 in Youth? Size Chart & Fit

A youth 10/12 is a Youth Medium: it fits a 28 to 30 inch chest and 54 to 58 inches in height. See shirt measurements and how it compares to youth S and L.

Darrin DeTorres• DTF Database Founder
October 8, 2026
3 min read
Youth 10/12 equals youth medium: body chest 28-30 inches, height 54-58 inches, shirt about 17 inches wide and 23 inches long
A youth 10/12 is a Youth Medium. It fits children with a body chest of about 28 to 30 inches and a height of about 54 to 58 inches. The shirt measures about 17 inches across the chest and 23 inches long. Youth Small is 6 to 8 and Youth Large is 14 to 16, so 10/12 sits in the middle of the range.

What size is a 10/12 in youth?

A 10/12 in youth is a Medium. The standard youth range is XS (4 to 5), S (6 to 8), M (10 to 12), L (14 to 16) and XL (18 to 20), so the size 10 and 12 share one shirt size. Nike's boys' charts put the same garment at about ages 10 to 11. Use the chest and height ranges below rather than age, because fit varies more between children than between brands. Our guide to what size is youth medium goes deeper on this size.

Youth 10/12 shirt measurements

Flat shirt measurements, in inches, from manufacturer spec sheets:

Youth 10/12 shirt measurements
StyleChest widthLength
Gildan 5000B Heavy Cotton1823.5
Gildan 64000B Softstyle1722
Port & Company PC54Y1723
Bella+Canvas 3001Y16.2522.125
Next Level 331016.7522
District DT6000Y16.523.5

The average youth medium across these styles is about 17 inches wide and 22.75 inches long.

Youth 10/12 vs the sizes around it

Youth 10/12 vs the sizes around it
SizeLabelBody chestHeight
Youth S6 to 825 to 27 in50 to 54 in
Youth M10 to 1228 to 30 in54 to 58 in
Youth L14 to 1630 to 32 in58 to 62 in

If a child is between sizes, order the larger one for a relaxed fit or if they are growing, and the smaller one for a snug fit. Soft, fitted brands such as Bella+Canvas and Next Level run narrower than Gildan 5000B.

How to print a youth 10/12

A youth 10/12 shirt takes a smaller design than an adult one. A full front print is about 8 by 9 inches, a left chest print about 3 by 3 inches and a full back print about 9 by 11 inches. Press on cotton at 300 to 325 degrees F for 10 to 15 seconds with medium-firm pressure, then cold peel. Our youth size chart guide and design size master chart list every size, and the Jerzees 29BR youth guide covers a common budget blank.

Frequently asked questions

What size is a 10/12 in youth?

A 10/12 in youth is a Medium. It fits a body chest of about 28 to 30 inches and a height of about 54 to 58 inches.

Is a youth 10/12 a medium or a large?

It is a Medium. Youth Large is 14 to 16 and Youth XL is 18 to 20.

What adult size is a youth 10/12?

It is smaller than an adult small. An adult small in the Gildan 5000 is 18 inches wide and 28 inches long, while a youth medium is about 17 inches wide and 23 inches long. Most children move to a youth large or XL before an adult size.

How old is a size 10/12 in youth?

It generally fits ages 10 to 12, but fit is by chest and height. Measure the child and check the brand chart.

How big is the print area on a youth 10/12?

A full front design is about 8 by 9 inches and a left chest design about 3 by 3 inches. Test on one shirt first.

About the Author

Darrin DeTorres

DTF Database Founder

Darrin DeTorres has over 10 years of experience in the print industry, specializing in screen printing, sublimation, embroidery, HTV, and DTF printing. He runs Notice Me Marketing and Media, a custom apparel production company that prints thousands of shirts per month.

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