Can I return a swimsuit to Victoria's Secret and American Eagle?

I'm ordering swimsuits from Victoria's Secret and American Eagle and I don't know what size I am exactly so i'm ordering a small and a medium in all of them. I plan to return the ones that don't fit to the VS and AE stores near me but i just want to make sure I will be able to return them. Is there some policy that doesn't allow the return of swimsuits or something? thanks!