Ko Mak has 27 km coastline, many long sand beaches, a few hills and it is about 16 km² in area.
On low tide, it is possible to walk to Ko Kham privately own , which is a smaller island less than 1 km northwest from Ko Mak. Ko Phi, also north west from Ko Mak but southwest from Ko Kham, is not occupied.
For exploring the island, scooters and bicycles are available for rent at numerous locations, and most beaches and restaurants are within easy walking distance.
