1. Valid passport: Ensure that your passport is valid for at least six months beyond your intended stay in South Korea.
2. Visa application form: Complete the visa application form accurately and legibly.
3. Passport-sized photographs: Provide recent passport-sized photographs according to the specifications mentioned by the embassy or consulate.
4. Proof of travel Itinerary: Provide a detailed itinerary of your trip, including your accommodation arrangements, dates of travel, and planned activities in South Korea.
5. Proof of Financial Means: Submit documents demonstrating your financial capability to cover the cost of your stay in South Korea. This can include bank statements, income tax returns, or proof of employment.
6. Accomodation Confirmation: Provide proof of accommodation arrangements in South Korea, such as hotel reservations or a letter of invitation from a sponsor.
7. Travel insurance: Obtain travel insurance that covers medical expenses and emergencies during your stay in South Korea. Ensure that the insurance is valid for the entire duration of your trip.

The standard tourist visa for South Korea typically allows for a stay of up to 90 days. However, it is important to note that the immigration officer at the port of entry ultimately determines the duration of your stay based on their discretion.

The visa processing time can also vary depending on the embassy or consulate where you apply and your nationality. In general, it can take anywhere from a few days to a few weeks for your visa application to be processed. It is advisable to apply well in advance of your intended travel dates to allow for any potential delays.