The beach of the island of Rang Yai (Ko Rang Yai). The water here is clean, unlike the entire east coast of Phuket. In the period between high tide and low tide, strong currents sometimes occur along the beach. There is a cafe on the beach with quite a decent selection of Thai dishes. You can get here by longtail from the neighboring island of Maprao Yai, or from the Laem Hin Pier.
Also keep in mind that among other reviews about this small beach there are photos of landscapes from completely different places that you will not see here (Bang Tao Beach, Phi Phi Islands, Phuket Island itself).
The beach is very beautiful. But you won't be able to swim. There is a guard. There are a lot of tourists. But it's an interesting place for an excursion. Just being here is perfect.
Everything is fine, everything is beautiful. But there are sooo many people. Taking a picture alone on a beautiful background is problematic.
There are other beaches with the same sand.