Vintage 1980s 80s Button Up Blouse with Ruched Red Chiffon Sheer Long Sleeves

What would you call these sleeves? Is there a name for this style? I was thinking maybe leg of mutton but I feel like maybe there’s something more specific to this particular style. Label: Patty ESTIMATED SIZE: M (Medium) - And marked as such. MEASUREMENTS: Bust: 38” Waist: 29” Shoulder to hem: 26.5” CONDITION NOTES: - Missing last button. - Two small holes on lining, not visible from outside. One is from the missing button. - Patch of worn chiffon near one armpit.