The 30F bra has a bigger band than the 28G bra. The 28G bra has deeper cups than the 30F bra, but they are about the same width.
Wilder Moulded Plunge Bra - Mono – Leia Lingerie
Thin and Curvy: Victoria's Secret bras don't even fit the models!
28FF - Freya » Deco Moulded Plunge Bra (4234)
Freya Women's Deco Underwire Molded Plunge Bra, Black, 28D at
Freya » Deco Rebel Moulded Plunge Bra (4234)
Thoughts on the Freya Deco Plunge – Let's talk about bras
Thin and Curvy: Victoria's Secret bras don't even fit the models!
Thoughts on the Freya Deco Plunge – Let's talk about bras
Freya Women's Deco Underwire Molded Plunge Bra, Black, 28D at
Thoughts on the Freya Deco Plunge – Let's talk about bras
Thin and Curvy: Victoria's Secret bras don't even fit the models!
Freya T-Shirt Bras
Bra Review – hourglassy.com
Bras I Hate & Love: What Freya Has To Offer (Brand Overview)
Deco Underwire Plunge T-Shirt Bra