Kids Long Sleeve T-Shirts – Soft Cotton for Year-Round Layering

100% CottonSchool and LayeringXS to XL

Kids long sleeve shirts in 100% cotton for boys and girls. Worn alone for mild days and as a base layer under hoodies and fleece in cold weather. Pre-shrunk, machine washable, and sized consistently XS through XL.

100% Cotton School and Layering Machine Washable 100-Day Guarantee

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Kids Long Sleeve Shirts for School, Play, and Layering

100% Cotton

XS–XL Youth Sizing

100 Day Guarantee

Kids long sleeve shirts cover youth XS through XL in 100% cotton, pre-shrunk and machine washable. They function as a standalone top in mild weather and as a base layer under hoodies, sweatshirts, and fleece in cold weather. The long sleeve adds warmth without the weight of a fleece layer, making them the practical choice for cool classrooms, autumn outdoor play, and layering systems where a child needs to remove a top layer during PE.

Kids Long Sleeve Shirts for Layering and Standalone Wear

A fitted long sleeve shirt under a hoodie or sweatshirt is the standard school layering system for cold months. The cotton fabric sits flat under a fleece mid-layer without bunching at the chest or arms. Long sleeve shirts are also the right choice as the base layer under a waterproof jacket for outdoor mornings: they add warmth without the bulk that makes a jacket sit awkwardly. As a standalone top in mild autumn and spring weather, a long sleeve shirt is more appropriate than a t-shirt but lighter than a sweatshirt. The versatility of a single long sleeve tee across all three roles is why it gets more use per item than most other pieces in a school wardrobe.

Sizing Kids Long Sleeve Shirts: XS to XL

Youth long sleeve shirt sizes run XS (approximately age 4-5, chest 22-23 inches), S (age 6-7, chest 24-25 inches), M (age 8-10, chest 26-27 inches), L (age 11-12, chest 28-30 inches), and XL (age 13-14, chest 31-32 inches). For long sleeve shirts worn as a standalone top, true to size gives a comfortable regular fit. For long sleeve shirts worn under a hoodie as a base layer, true to size works well: the regular fit is not so oversized that it bunches. For children at the top of a size band, size up to avoid the shirt pulling at the shoulders when layering.

Kids Long Sleeve Shirts for School and Outdoor Use

Plain long sleeve shirts in white, navy, and grey work for school uniform at primary schools that permit casual uniform options. For schools with stricter dress codes, a long sleeve tee worn under a polo shirt provides an extra layer without being visible. For outdoor autumn and spring activities including school trips, sports days, and playground use in cooler weather, a long sleeve cotton shirt is light enough to not overheat during activity but warm enough for standing around between activities.

100% Cotton Long Sleeve Kids Shirts: Fabric and Care

100% combed ringspun cotton is soft against the skin and breathable for all-day indoor and outdoor wear. Pre-shrunk to hold size through the school year at cold wash temperatures. Machine wash cold on a standard cycle, tumble dry low. Wash inside out to extend colour life. Avoid hot wash: above 40°C, cotton shrinks noticeably even when pre-shrunk.

For mid-layers to wear over these, browse kids hoodies and kids sweatshirts for cotton-fleece options that pair with a long sleeve base.

Fabric: 100% Cotton Jersey

Long sleeve shirts in 100% combed cotton jersey. Soft against skin, breathable in mild temperatures, and warm enough as a base layer in cold weather. Pre-shrunk at a weight that provides enough body to the sleeve without feeling stiff or heavy. The cotton washes and dries consistently without the sleeve length changing after repeated washing.

As a Standalone Top or Base Layer

Standalone: mild autumn and spring days when a short sleeve is too cold but a hoodie is too warm. Base layer: under a hoodie or sweatshirt in winter to add a warmth layer. The long sleeve extends below the hoodie sleeve by approximately 1-2 inches — the classic cuff-layering look that also adds warmth at the wrist.

Fit: Regular, XS to XL

The regular cut sits straight through the chest and body — not fitted, not oversized. The sleeve length is cut to reach the wrist at the correct size. Youth XS approximately age 4-5 through XL approximately age 13-14. Check both body length and sleeve length on the product page — sleeve length is the most size-sensitive measurement on a long sleeve shirt.

Care: Machine Wash, Tumble Dry Low

Machine wash cold. Tumble dry low. Pre-shrunk cotton means the sleeve length holds after washing — no first-wash sleeve retraction. Wash graphic versions inside out to protect any printed elements.

Combed Cotton — Soft Through the Full Sleeve

The sleeve makes contact with more skin surface than a short sleeve tee, so fabric softness matters more across the full arm. Combed cotton removes coarser fibres and produces a consistently smooth inner surface.

Sleeve Length Holds After Washing

Pre-shrunk cotton means the sleeve length is consistent from the first wear through the last wash of the season. The sleeve you try on in September is the same length in March.

Works as Both a Top and a Base Layer

A long sleeve shirt that works as both an outer top in mild weather and a base layer under fleece in cold weather is twice as useful per piece. The regular fit is not so close that it bunches under a hoodie.

Tagless — No Collar Irritation at the Neck

The collar is the most common point of irritation for kids wearing long sleeve tops. These use tagless or easy-tear labels at the neck.

100-Day Guarantee

Every kids long sleeve shirt is covered by our 100-day guarantee. Sleeve length change, seam failure, or fabric degradation within 100 days — we replace or refund.

"My son wears these under his hoodie all winter. The sleeve peeks out from the hoodie cuff and it looks neat. The cotton is soft and after dozens of washes the sleeve length has not changed at all."

Fiona L.

March 2025

Verified

"Good school tee for autumn and spring. Not too thick to wear under a blazer, not so thin that it is cold. The sizing is accurate and consistent across the range."

George T.

February 2025

Verified

"Bought a 3-pack for my daughter. The fabric is genuinely soft — she has eczema and these are the only long sleeve tops she will wear without scratching her arms. Washing has not changed the softness."

Pippa H.

April 2025

Verified

Can kids long sleeve shirts be worn under hoodies?

Kids long sleeve shirts are the standard base layer under hoodies and sweatshirts. The fitted cut sits flat under a fleece mid-layer without bunching at the chest or arms. A long sleeve tee under a hoodie adds warmth for cold mornings without the bulk of an extra full sweatshirt. For this use, choose a size that fits close to the body: the layering system works better when the base layer is not oversized.

Do kids long sleeve shirts shrink?

Pre-shrunk kids long sleeve shirts experience minimal shrinkage when washed cold. Machine wash at 30°C or below, tumble dry low. Pre-shrunk 100% cotton at cold wash temperatures typically shrinks under 3%, which does not meaningfully affect the fit. Avoid hot wash and high dryer heat: above 40°C, cotton long sleeve shirts can shrink noticeably and the sleeve length and body length both shorten. The pre-shrinking process is the key difference.

What size long sleeve shirt for an 8-year-old?

For an 8-year-old of average build, start with a youth M, which fits approximately age 8-10 with a chest measurement of 26-27 inches. For a child who is taller or broader for their age, try L (age 11-12, chest 28-30 inches). Long sleeve shirts worn as a standalone top should fit with room to move but not excess fabric. Long sleeve shirts worn under a hoodie should be one size smaller to avoid bunching.

Are kids long sleeve shirts allowed at school?

Plain long sleeve shirts in white, navy, grey, or black are accepted as part of informal school uniforms at most primary schools that permit casual uniform. Schools with stricter dress codes may require a polo shirt or formal button-down. Long sleeve shirts are the practical choice for cold weather at schools where a hoodie or sweatshirt is not permitted: they provide extra warmth as a base layer under a polo shirt or uniform top without being visible.

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Kids Long Sleeve T-Shirts – Soft Cotton for Year-Round Layering

Youth Long Sleeve T-Shirt | Cotton Kids Long Sleeve Tee Boys and Girls

Kids Long Sleeve Shirts for School, Play, and Layering

Kids Long Sleeve Shirts for Layering and Standalone Wear

Sizing Kids Long Sleeve Shirts: XS to XL

Kids Long Sleeve Shirts for School and Outdoor Use

100% Cotton Long Sleeve Kids Shirts: Fabric and Care