Dear Perthpal,
I hope that the links that iserbrown has given are useful.
My first post op bra was supplied at the hospital, and I was given a soft temporary insert.
I don't remember having too much trouble. But I went bra-less at home.
I'm guessing at 6-8 weeks I was fitted with a proper silicon prosthesis.
This is covered by Medicare, and every 2 yrs.
For the most part it fitted well. They come in different weights.
Your bra fitter and prosthesis fitter ( should be the same person ideally), should be able to fit you with the best prosthesis and bra.
I was an 18DD. I did find my bras drifted to my remaining breast side. No one else noticed, but it did annoy me.
My experience of Radiotherapy was not bad. My Mastectomy, Chemo and R/T was all in 2020.
Probably not relevant to you just now. But I had breast reconstruction 6 weeks ago.
I wasn't suitable for the DIEP, and have had a R Lat Dorsi, and L prophylactic Mastectomy, both with tissue expanders.
I am symmetrical and currently an A/B cup. I'll probably expand to a C cup. 50 pls per week until I'm happy.
Then the Implants.