This is 150cmxx70 cm, so about 60x27.5

Here is a link that might be useful: steel bath tub

Nothing "European" about steel bathtubs. They've been sold for years here as an economy alternative to cast iron. They dent, chip more, and are much louder than cast iron.

Looking at the Kaldewei tubs, they have much heavier steel than the American brands, and are guaranteed for 30 years.

Here is a link that might be useful: kaldewei