The 38DD's band is a lot longer than the 36DDD bra. The cups are quite similar in both bras.
Paramour Women's Marvelous Side Smoother Seamless Bra - Buff Beige 36ddd : Target
Natori Revelation Contour Underwire T-Shirt Bra
Sister Sizes: The Bra Secret Every Person Should Know – Sister Sizes & Equivalent Bra Size Chart – ThirdLove
Paramour by Felina 255946 Madison Contour T-shirt Bra 38ddd Beige Nude for sale online
Paramour by Felina Topaz Breathable Contour Bra (Warm Nude, 32B) at Women's Clothing store
Paramour Madison Full Figure Contour Bra - Macy's
Paramour by Felina 135008 Vivien Plunge Contour Underwire
What Are Sister Bra Sizes?
Style #255946. Hook and Eye closure. Center front bow detail.
Paramour by Felina Women's Madison Contour T-Shirt Bra, #255946 BNWT, DD-34
Johana Medium Beige Plus Contour Demi, 38DD-46DDD
Womens 36ddd Bra : Target