Aero sport bra and pants set size OS NWOT

I put this as a set the colors go great together! but only the SPort bra Says Aero on it, but there are no size rags, the tag got lost! and the leggings there are not any size tags or brands. For the size you have to go by the measurements for the pants and for the bra! the bra comes with pads, and the pants have pockets on both sides of the legs.