Raglan sleeve

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.

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]