We have a hot tub & I use it almost daily year round so I go through suits. However, Catherine's, Land's End have been where I've gotten the most comfortable, long lasting suits. I am a 20/22. I like a one piece strapless. If I were going to my DS"s pool, I throw on a pr of shorts over it if I am not in the water or I have a skirt cover up thingy.
We have earned the right to wear a bathing suit regardless of our size. So as a woman, get that suit & enjoy the beach!