Boobs after weaning

Hi mamas! I exclusively breastfed both my babies for 18 months, one after the other, which I’m SO thankful for but I just recently weaned my youngest and it took a toll on my confidence and how I feel about myself. I’m sure the change in hormones contributed as well. I guess I was so used to seeing my boobs a certain way and now they’re obviously smaller & more saggy. My question is do they firm up at all after a few months or stay the same? I’d like to buy some new bras but unsure which size anymore 🤦‍♀️