The 40F's band is a lot longer than the 38G bra. The 38G bra has wider cups but they are both about the same depth.
Bra Shifting/Pulling 38F - Cacique » Embroidered French Full
Advice - Bra Shapes Explained
Cacique 38F Bras & Bra Sets for Women for sale
Women's Bras – Comfortable Underwire, T-shirt Bras, Push-Up Bras and More at Maidenform
Cacique French Terry Bras
Comparing a 38G Panache Andorra Plunge (5676) with a 38FF Curvy
Wide Strap Bra Plus Size Full Coverage Underwire Support Panels 34 36 38 40 42 44 46 / C D E F G H I J ( 38J, Red)
Wide Strap Bra Plus Size Full Coverage Underwire Support Panels 34 36 38 40 42 44 46 / C D E F G H I J ( 38J, Red)
Maidenform Extra Coverage T-Shirt Bra
Cacique 42F Bras & Bra Sets for Women for sale
Advice - Bra Shapes Explained