Raglan sleeve

Ignore length. Look at the shoulder seam. On a raglan, there is no seam sitting on the shoulder bone. The sleeve panel runs up to the collar, and a diagonal seam runs from the underarm toward the neck.[1]

The armhole is larger and usually more mobile than a set-in sleeve. Contrast-color raglan panels on T-shirts make the diagonal especially obvious.

The name is British and military. FitzRoy Somerset, 1st Baron Raglan, lost an arm at the Battle of Waterloo in 1815 and later commanded in the Crimean War.[1] He is associated with an overcoat whose sleeves continued to the neck, giving a larger, looser armhole.[1] The Oxford English Dictionary records the garment name; an entry appeared in the New English Dictionary in 1903.[1] Writer Michael Quinion notes that the raglan overcoat, like the cardigan, is one of the Crimean War clothing names, and that the one-piece sleeve-to-neck cut suited a one-armed wearer.[2]

From outerwear the cut moved into knitted garments, sports shirts, and underwear. In Major League Baseball, a raglan mid-length sleeve has been a common undershirt under the jersey because the construction leaves the shoulder freer.[1] The same diagonal is now standard on sweatshirts, rugby-adjacent knits, waterproofs, and many baby and children’s garments where a set-in armhole is harder to sew in stretch fabric.[1][3]

The raglan is a construction, not a length or a fiber. It can be short or long, woven or knitted, formal in a trench or casual in a baseball tee.[1]

Historical: nineteenth-century British overcoats. Later: rainwear, knit sportswear, baseball, casual sweatshirts, and children’s wear.[1][2]

It is chosen wherever reach and layering matter—throwing a ball, pulling a sweater over a shirt, or cutting a waterproof that must move at the shoulder. It is less common in sharp suiting, which still prefers a set-in, often two-piece, sleeve.

What is worn now: baseball tees with contrast sleeves, crew-neck sweatshirts, hoodies, rain jackets, wool coats with raglan shoulders, and infant knits.[1]

Use raglan when you want an easy shoulder and a sporty or outdoor line. Contrast sleeves are a baseball cue. Matching-color raglan is quieter and looks like a knitwear classic. Avoid pairing a heavily padded raglan with a fitted suit jacket; the two shoulder languages fight.

A set-in sleeve joins the body at the armhole on the shoulder. A raglan replaces that armhole with a diagonal to the neck.[1] A kimono or dolman sleeve is also cut toward the bodice but as a wide, shallow slope rather than a distinct diagonal panel. A cap or puff sleeve describes length and volume, not this seam.

“Baseball sleeve” in shops usually means a contrast raglan T-shirt, not a different pattern.[1]

Raglan reads athletic, practical, and informal when the panels contrast, and quietly functional when they match. The diagonal draws the eye from neck to underarm, which can slim or broaden the shoulder depending on stripe placement.

Who was Raglan? FitzRoy Somerset, 1st Baron Raglan, a British commander who lost an arm at Waterloo. The overcoat associated with him used sleeves cut to the neck.[1][2]

Is raglan only for T-shirts? No. It began as overcoat construction and is still used on coats, rainwear, and sweaters.[1]

Does raglan always have two-tone sleeves? No. Two-tone is a baseball-shirt habit. The definition is the seam, not the color.[1]