Speedo-style bathing suit for lap swimming. Size L

So this suit says 5x but it’s sizing from Spain. When I bought it I was a size 18 and it was too small. I would guess it’s a large or a size 12/14. Cross strap back with medium thin straps and full coverage bottom. As you can tell, I bought it for the Pegasus on the front. I would guess the suit is about 5 years old, but the elastic still feels good.