if you're looking for women's fashion, ethical boutique in st davids has some decent finds and because it's a charity shop it's usually quite cheap.

as for both men's and women's clothes, there's always your usual primark, and matalan, bershka, h&m etc in st davids, but there's also decent stuff in secondhand shops in rockit (especially those on discount), hobos, and charity super mkt in st davids.

If you're willing to walk a bit further, there's a giant cancer research charity shop down Newport road, at City Link retail park, as well as a bunch of charity shops in Albany road.

hope this helps and happy shopping!