Pivot Point International, Inc. v. Charlene Products, Inc.
372 F.3d 913 (7th Cir. 2004)
A hair mannequin.
This litigation went on for a long time. The initial filing was in 1991, and 2 years before this appeal was decided, the parties filed a motion to vacate the judgement (apparently to avoid issue preclusion in another case). The motion was denied, and the parties then litigated this appeal.
You can order Pivot Point mannequins online, and they have models for education and competition. Charlene Products mannequins are also available, and appear to be slightly less expensive.