I'm a 34C and want to be a 38D. I am 5'2 and 135lbs. What size implants should I get?

Your question shows a common misunderstanding in bra sizing:  the first number (34 or 38) represents your rib cage measurement.  This would stay the same after breast augmentation surgery, unless you gain or lose a bunch of weight.  So, if you are a 34 band - that will stay the same.

The cup size is what will change.  If you want to up one cup size (34C to 34D), that would be a fairly conservative implant.  I like to use a dimensional sizing system and fit the width of the implant to the width of your breast...so I'd have to examine & measure you to help pick out the correct size implant for you.

To chose the best implant size for you, you should try out different sizers or get a 3D scan that simulates the results of a breast augmentation.  In our practice we have both options but I find using sizers simpler and easier.  Talk to your plastic surgeon or get additional opinions if you wish.

Sincerely,

Martin Jugenburg, MD