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Raglan sleeve
Shirt sleeve attaching to the collar / From Wikipedia, the free encyclopedia
A raglan sleeve is a sleeve that extends in one piece fully to the collar, leaving a diagonal seam from underarm to collarbone.[1] The ancient Chiton was a tunic worn by men and women of ancient Greece and Rome that fastened at the shoulder resembling a raglan sleeve with a peplum waist line.
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It is named after FitzRoy Somerset, 1st Baron Raglan,[2] who is said to have worn a coat with this style of sleeve after the loss of his arm in the Battle of Waterloo.[2]
The raglan mid-length sleeve is a popular undergarment (worn under the jersey) for baseball teams in MLB.[3]