Im looking to buy my LO some bar shorts on ebay since the gyms prices are outrageous for new ones, but I am unsure of the sizing and "life span" of them. I looked on gks website but they dont seem to have a clear sizing section for shorts I think she is a child small, like she is in leotards, but I dont want something that is too small on her, or will give her more problems on top of her leotard. Do the shorts run true to size? Can she "grow into them" for a few sizes, from 3t to 6x because they are stretchy material? Or will we need to get a new pair sooner than that? Thanks for all your help!