If I remember clearly, it's one of the 70 ga-gillion Grommet belt options they sell on the size racks at the check-out counter the kiosks hawk on the way out of the open air and closed building malls in my area.
Her's is from like a really old Spring collection, I think.
It might even be a Wal-Mart brand belt that's worn from years of use.
This belt that I have at full measurement is 4 ft, which for a size chart on belts, using
ASOS.Com's chart would, as I said, would make this an adjustable belt for the XXL at ~121cm, and in the smallest holes at ~106.68cm (~3.5ft) when worn.
Eyeballing her Hi-Waist and her regular Waistline, and making a few educated guesstimates from my work & wardrobe experience, I'd confidently say she's anywhere between Size 16-ish if she squirms on the bed fighting the buttons up to a Size 22.
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Which makes her L-Core/L-Curve on a sizing chart using EU measurements as L/XL, and in US sizes (
link), like a solid 19-Wide.
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In short, she's homely pudgy-fat.
But we already knew that.
Chalk it up as the consequence of sitting on her fat ass all day, every day.