Train 261 from Bangkok to Hua Hin beach resort, is a slow, but very cheap Ordinary train with all 3rd class, fan cooled carriages, and is the cheapest way to travel.
3rd Class seats.
Third class Ordinary trains can operate with a variety of carriages, all of which are quite old a run down, so don't expect too much.
Seating can be in the form of wooden seats, or padded seats, depending on what rolling stock they have available.
For shorter journeys like this to Hua Hin, they can be quite good fun and a real authentic rail experience in Thailand.
The carriages are usually quite crowded, with lots of luggage, goods for trade being taken to market and the odd chicken.
Hawkers parade up and down the aisle selling food and drinks and when the train stops at one of the larger stations, you usually get a rush a hawkers trying to sell the goods, so you will never be short of something to eat or drink.
To buy tickets for this service, just turn up at Hua Lamphong railway station and buy your tickets on the day of departure.
Even when they are full, there will always be room for a few more standing passengers.