There are a number of sun gloves, often targeted toward fisherman. Sizing is often men’s S, M, L. You may find them locally in a sportsman type store.
I have an old pair of Coolibar fingerless gloves I love but now only available with full fingers.
If you order online make sure it states the UPF factor. There are gloves on amazon that are marketed as sun gloves but not actually UPF rated.
Landsend has a variety of UPF swim shirts that are not skin tight and can be worn as regular tops as well as in the water. Columbia has a good selection of button type sunshirts.