Thailand and Packing

One medium to large suitcase should be enough. What you don't bring you can buy cheaply - including another suitcase.

For the most part, Thailand is hot and humid. The heat index frequently goes over 100 degrees Fahrenheit. There is no need to bring a jacket unless you are going to the north during the cool season (November to February) where it can get chilly at night.

Cotton clothing is best suited to the climate.

While miniskirts and other revealing clothing have caught on with some young trendy urban Thais, most Thais, especially outside big cities, frown on revealing clothing. To be a good representative of your country, modest clothing is suggested.

Three or four sets of clothes are enough for most people. Nearly all hotels offer inexpensive and fast laundry service.

Bring both short pants and long pants/skirt. If you expect to go to the beach or a hotel with a pool, bring your bathing suit. (Women swimming topless is a no-no except at tourist beaches where it is tolerated but frowned on. Please respect Thai culture.)

Bring your undergarments, including a bra. Going braless in Thailand is not appreciated and it may be difficult to find your size.

If you wear a size small, medium or large in western clothing, you can buy clothes in Thailand very cheaply; for example a t-shirt will run you about $2.50. Finding size XL or larger in Thailand is difficult. If you do buy clothing, try it on first. Generally something that says XL is much smaller and there isn't any standardization.

Suitcases and bags of all types can be purchased in Thailand for very reasonable prices.

Film and processing are available everywhere and at reasonable prices. There is no need to bring any film.

Large sized shoes and sandals are difficult to find. You should bring some decent shoes for going into temples and historical sites as well as comfortable walking shoes.

Flip-flops are easy to find (in small and medium sizes).

High heels probably aren't necessary if you are simply touring. If you are going to some special function or expect to deal with the Thai bureaucracy, you should bring formal shoes of some type.

Heavy-duty boots are not recommended.

Rather than Levis or other heavy denim, you may want to consider chinos.

Medicine of most types is readily available and usually no prescription is required. If you are taking some type of relatively new medicine, it may not be available. Be sure to know the generic name of what you take.

Lotions and creams can be found in Thailand. If you have a favorite that you must have, bring it along because you might not be able to find it.

For women, sanitary napkins are easy to find but tampons are virtually unavailable.

Books in English are only available in large cities and tourist destinations.

Children
Disposable diapers are available in provincial centers around Thailand. Toys, crayons, coloring books, paper and pencils are easy to find.

Children's books in English are only available in major cities. Children's clothing is very cheap. There is no need to bring a lot.

Unless absolutely necessary, a stroller in not a good idea. The sidewalks are usually such that using them is just has hard as carrying the child.

Standard medicines for children, such as aspirin and cough syrup are easy to get.

Some packing details and suggestions
And packing a medical kit for Thailand