I'm confused about sizes and styles (original versus "redesigned"?) of Russel Wright Pinch glasses. Are some of these lookalikes made by competitors? The four I own, two and two, are shown here. The larger ones are heavier and thicker glass, with indented bottom. The smaller one is thinner glass, with a flat bottom. Although it's hard to see in my photos, the taller one has oval-shaped indentations to sides, whereas the smaller is more rounded. Taller one is 4 3/4" tall, 3 5/8" diameter. The shorter is 4 1/2" tall, 3 1/4" diameter. I'd love to know what I have.