Allegra KWomen's Tank Top with Straps

Does this shrink in the wash?

I’m 5’3”, 106 lbs, and size c chest. should i get an xs or s?

Which size chart should i use? amazon's click on or the allegra k chart pictured in description. with one im an xs and the other a l.

38 bust, am often in between sizes recommend a medium or lrg?