I buy 3 packs of soft cotton sports bras from walmart for around the house made by fruit of the loom. Very comfortable, but with minimal support.
Pinksugar,
The best sports bra I have ever used is by Enell, it is the only one that I have found to give support to the girls. They have standard sizes but will custom make them if the sizes don’t fit. If you NEED support I would recommend checking them out.