So these are the two "smaller" covers they sent me to review. All I can say, glad I didn't pay money for these because if I did I would return them. They're pretty thin, almost like a "tarp" thickness, and as you can see, even though they claim to be smaller.
First one (description from Amazon) "Measures 51"W x 27"D x 42"H, compatible with Weber 7139 gas grill cover, Spirit II 300 Series, Spirit SX 300 series, Spirit 200 series (with side mounted controls). Also fits most 2 to 3-burner outdoor grills of popular grill brands such as compatible with Charbroil, Nexgrill, Kenmore, and more. Please measure your grill before purchasing"
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Second one:
Grill Cover for Outdoor Grill, BBQ Gas Grill Cover, Barbecue Cover, Waterproof, Anti-UV, Rip-Proof, Fade Resistant Material, Heavy Duty, (52" W x 25.8" D x 42.8" H, Black & Brown)
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They're both sloppy
Part of it is that they're so "deep" and the Silver B isn't that "deep". I also think these Chinese sellers probably just list the same product under multiple listings and maybe they figure that if it's a little large, no biggie, it still "fits" those measurements stated, just like if I put a XXL T-shirt on my L-sized body, the shirt "fits over me"