Im a 36B can i fit into a 34C?

hey so im 13 and im a 36B (its gettin kinda snug) and i have been reading about bra measurments and it says people who are 36B can fit into a 34C because the band is slightly shorter but the cup is just slightly bigger making it almost the same as wearing a 36B is this true? coz im goin bra shoppin soon so do you... show more hey so im 13 and im a 36B (its gettin kinda snug) and i have been reading about bra measurments and it says people who are 36B can fit into a 34C because the band is slightly shorter but the cup is just slightly bigger making it almost the same as wearing a 36B
is this true? coz im goin bra shoppin soon so do you think i should try on a 36B then a 34C to make sure?
thankyou
Update: my bra was like normal spaced no huge gaps in the bra it just fitted fine but now its getting tight and feel like it might come out and my bra has unhooked its self THREE times today so thats what i meen i couldnt be bovered to go into a long description lol
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