本ほん開びらき

noun

functioning cuff buttons; working buttonholes on jacket sleeves

Refers to jacket cuffs where the buttons can actually be buttoned and unbuttoned, as opposed to decorative non-functioning buttons. Often a sign of higher-quality tailoring.

See also: 本切羽

• このジャケットは本ほん開びらきなので、袖そで口ぐちのボタンを外はずせる。

  This jacket has functioning cuff buttons, so you can unbutton the sleeve cuffs.

noun

surgeon's cuffs

A specific style of functioning cuff where the sleeve can be opened wide, originally designed for surgeons to roll up their sleeves without removing the jacket. A subset of 本開き.

• 外げ科か医いのスーツには、よく本ほん開びらきの袖そでが採さい用ようされている。

  Surgeons' suits often feature surgeon's cuffs.