You only get one berli post surgery bra in the my care kit , if you want more you can buy online anything front closing ( important) and soft wide straps and sides, and with a pocket inside for prosthesis .
I wore mine home from hospital ( ages ago) and the light insert . You feel really self consious but honestly no one notices. Take a light weight scarf helps to cover lost cleavage . ( scarves are your new friend)
You can really wear any stretchy soft pull on ( up from waist) crop tops too and pop a prothsesis in there. DD may need two temporary ones.
I am a dd now and the soft forms often only go up to as prosthesis size 12 or 13 which is about a D , but they vary . There are many different types of prosthiesis and fabrics and shapes. But most people start with light and soft versions.
https://www.berlei.com.au/bras/shop-style/post-surgery.html
There are several other brands of post surgery bras and brands too. Note some arepost surgery compression for when ladies have had complex recon surgery that has to be held firm and tight , so you don't need that type that are stiff and very structured .
Amoena https://www.amoena.com/au/retailers/
( Myers also usually stock the amonea post surgery ) https://www.myer.com.au/c/women/lingerie/bras/bras-post-surgery
https://www.kmart.com.au/product/2-pack-wirefree-post-surgery-crop-s124817/
Booty have a new post surgery one www.boody.com.au/products/post-surgery-bra
Online masectomy stores Erilain /www.erilan.com.au
Tracey G Mastectomy./The masectomy store https://www.traceyg.com
Once you have healed up and got your shoulder motion back, then make an apointment for a proper prothesis with a masectomy bra fitter, if you can't get to one, some of them do online consultations and post you stuff to try. But its worth a long drive to get to one in person if you can. After first fitting then you can reorder stuff online. It feels weird at first and takes time to get used to new body. But before you know it you will just pop it on and get on with your day and no one can tell we are missing one boob.
Cancer be gone .