The shade sizes for the largest size chandelier is listed on the website: 11.8”, 9.8”, 7.9” circumference. From pictures, looks like the smaller chandelier has shades that are all the same size. We installed the base first and then screwed on the shades (hold shade upside down for easier install).  Only one shade is not level, you can only tell from one view. You can straighten the wires before hanging by running your fingers over it and bending it straight if that makes sense, I don’t think the smallest globe is heavy enough to straighten it with weight alone.