The ornamental design for a ceiling fan blades and blade irons unit, as shown and described.
FIG. 1 is a bottom plan view of the ceiling fan blades and blade irons unit in accordance with my design taken along line 1--1 in FIG. 2;
FIG. 2 is a front elevation view of the ceiling fan blades and blade irons unit in accordance with my design, the rear and the side views being substantially identical to that shown except for the position of the blades; and,
FIG. 3 is a top plan view of the ceiling fan blades and blade irons unit in accordance with my design taken along line 3--3 in FIG. 2.
The broken line showing of environmental structure in FIGS. 1-3 is for illustrative purposes only and forms no part of the claimed design.