How many passport pages are used for an ED visa in Thailand, including immigration checks?

When you obtain an ED (Education) visa for Thailand, it typically requires one page in your passport for the visa sticker itself. If you need to account for the three-month immigration checks, additional stamps will be placed in your passport upon each entry and exit, which could occupy more pages depending on your travel frequency. Regarding previous unused pages, immigration generally does not go back to use them; each current visa and entry stamp will be applied to the next available page in your passport.