Just basic t-shirts. Here's a link of the type of shirt that seems to fit. I like this brand but don't want to always wear it.

The North Face Women's S/S Shadow Box Tee https://www.amazon.com/dp/B09K1RKMK4/ref=cm_sw_r_cp_api_i_GKTAN92Y87V1NEA1DJ9Z?psc=1