SYROKANWomen's Front Adjustable Lightly Padded Wireless Racerback High Impact Workout Sports Bra Black 34DD

recieved this bra today it seems a little tighter than normal in the bust. My breasts are growing. Should I geta c cup or is this normal?

My fiancé is 32ddd at Victoria’s Secret, and we know they have weird sizes. What size would she be with this bra?

How do you properly figure out your band size?

I am a 34h. what size would you recommend? should i size down since i want them to be tight while i do my workout? or should i get my actual size ?