These are not impostulators. They are the real thing, and do show some slight usage wear and base chipping. The dimensions are as follows: Hole in the head insulator. Base 2 in., height 2.5 in. Hole in head 3/16 in, and pinhole is 1/2 in dia. Noser insulator Base 1-7/16 dia. Height 1-15/16 in. top length 1-3/4 in. top width 1-1/8 in. Tiny T-bar Base 1-5/8 in. Height 2 in. length of "T" 2-13/16 top width 1-1/4 In. Pin hole dia in both noser and T-bar is 5/8 in. Hole in head and noser have NO inner skirt, while T-bar has an inner skirt to within 3/16 in of base. Any ideas as to countries of origin. Suggestions appreciated