to watch with folded arms (idiom); to look on without lifting a finger

sleeve

cuff

cuff link

sleeve cover; outer sleeve

armband; sleeve badge

pocket-sized; pocket (book etc)

armband (e.g. as part of uniform or to show status)

sleeve

armband

sleeve

spring-loaded arrow concealed in one's sleeve

little person; midget; dwarf

pocket book; paperback

erhua variant of 袖筒[xiu4 tong3]

pocket dictionary

pocket stereo; walkman