From Longman Dictionary of Contemporary Englishhalf-lengthˌhalf-ˈlength adjective AVPa half-length painting or picture shows the top half of someone’s body → full-length1(1)
Examples from the Corpus
half-length• It has both size drives, two free half-length 16-bit slots, and a further three empty full-length slots.• On their feet both men and women wear half-length boots of yellow calfskin trimmed with a red stripe on the turned-down uppers.• Most are half-length casts made from a mould taken before 1902, which were also copied in wood and marble.• The half-length success boosted Melody's prize-money to a record £75,000 - and produced another nice bonus for handler Matt O'Donnell.• Helmsman, a half-length winner under Chris McCarron, paid $ 6. 60 as the bettors' favorite. 