The 38GG bra has a bigger band than the 38G bra. The 38GG bra has wider cups but they are both about the same depth.
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Comparing a Cleo Marcie Balconnet Bra (6831) with Panache Ariza Balconnet Bra (5051) in 36GG
38GG - Cleo » Marcie Balconnet Bra (6831)
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38J - Cleo » Marcie Balconnet Bra (6831)
38GG - Panache » Envy Balconnet Bra (7285)
Panache Envy Full Cup Bra - Black
38GG - Panache » Envy Balconnet Bra (7285)
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Comparing a Panache Jasmine Balconnet Bra (6951) with Cleo Marcie Balconnet Bra (6831) in 36FF
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