Koh Pak Bia near Phang Nga — sandbar, limestone views, and a popular stop on 5–7 island jet ski tours from Phuket.
Quick answer: Koh Pak Bia (Pakbia) is a tiny sandbar between Koh Yao islands in Phang Nga Bay. It appears on many Phuket jet ski island tours and some speedboat routes — shallow turquoise water, photo stops, and short beach time.
Route page: Koh Pak Bia route · Compare jet ski vs boat tour · 5/6/7 island jet ski guide