Are Jupiter Saturn Neptune and Uranus bigger than terrestrial planets?
Yes, all four of those planets are larger than the terrestrial planets.
The planets that are not classified as terrestrial are Jupiter, Saturn, Uranus and Neptune. If you count Pluto as a planet then it would be a part of that list as well. Mercury, Venus, Earth and Mars are the terrestrial planets. Jupiter, Saturn, Uranus and Neptune are the gas giants. Pluto is a dwarf planet.