1. Passport: Your passport must be valid for at least six months beyond your intended stay in Thailand and have at least two blank pages for visa stamps.
2. Visa Application Form: You will need to complete a visa application form, which can usually be obtained from the Thai embassy or consulate or filled out online.
3. Two Recent Passport-sized Photos: The photos should be in color, taken against a white background, and meet the specified size and format requirements.
4. Flight Itinerary: A copy of your round-trip or onward flight itinerary showing your intended dates of entry and departure from Thailand.
5. Proof of Accommodation: You may need to provide hotel reservations or a letter of invitation from a host in Thailand, depending on your travel plans.
6. Financial Documents: You may be required to submit bank statements or proof of sufficient funds to cover your expenses during your stay in Thailand. The specific financial requirements may vary, so it’s advisable to check with the embassy or consulate.
7. Travel Insurance: Some embassies or consulates may ask for proof of travel insurance coverage for the duration of your trip.

The standard tourist visa for Thailand is the “TR” (Tourist) visa, which allows for a maximum stay of 60 days per entry. However, it’s important to note that the actual duration of stay granted by the immigration officer upon arrival in Thailand is at their discretion. In some cases, they may grant a shorter stay, such as 30 days, depending on your travel plans and circumstances. If you wish to extend your stay beyond the initial period, you may be able to apply for an extension at the Thai Immigration Bureau in Thailand.

The processing time for a tourist visa can vary depending on the embassy or consulate where you apply. In some cases, it may take a few working days, while in others, it may take several weeks.