This is a great basic girls biketard for dance or tumbling.  The best part is it is an all in one outfit but of course you can add a cute skirt if you like.  There are 2 styles. A halter strap or a cross back strap.  Fabric is stretchy lyrca and fits true to size.

4-6X Small-SC

7-10 Medium-MC

10-12 Large-LC