Chantelle Response: Some styles will run more generous in the back than others. Sublime 3952 is one of those. We would suggest trying one of the following Chantelle styles which should do the trick for you in a 34 back. Chantelle C Chic Sexy Spacer Foam T-Shirt Bra 3585 style converts to criss cross in the back, Chantelle Sexy Push Plunge Bra 3646 which allows you to criss cross the straps in the back and Chantelle Haussman T-Shirt Bra 3315. Shelby