It looks almost like a Brazilian sunga. The description doesn't have the length of the sides, so it might be less or more conservative than it looks in the picture. But in all, any swim brief is a good one.
Also, Target has a few swim brief options online.
https://www.target.com/c/swimsuits-m...1yZ55vjn?Nao=0
(For full disclosure, at the time of this posting, I work for Target)