No it IS the size of Singapore.
Lake Taupo covers 238 square miles (616 square kilometers), making it roughly the size of Singapore. It’s the largest lake in the country and has nearly twice the surface area of Lake Te Anau on the South Island, New Zealand’s next largest lake .
when considering only the main island of Singapore, which occupies about 581 square kilometers, Lake Taupō is still larger.
So, if you’re planning a swim, Lake Taupō offers a bit more space to splash around!