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When the club is in a 60 degree lie angle, the dimensions of the clubhead must be such that:
The distance from the heel to the toe of the clubhead is not greater than 5 inches (127 mm)
The distance from the heel to the toe of the clubhead is greater than the distance from the face to the back.
The distance from the sole to the crown of the clubhead, including any permitted features, is not greater than 2.8 inches (71.12 mm).
These dimensions are measured on horizontal lines between vertical projections of the outermost points of: the heel and the toe; and the face and the back and on vertical lines between the horizontal projections of the outermost points of the sole and the crown dimension