What visa do I need for a 90-day stay in Thailand with two re-entries on a German passport?

A German passport holder can enter Thailand without a visa under the visa exemption rule, granting a 60-day stay upon entry. This period can be extended by an additional 30 days at an immigration office for a fee of 1900 baht. After this, if traveling outside Thailand and re-entering, the process can be repeated, allowing for a total stay within the planned 90 days.