No, a Pulsar is not bigger than a quasar. In fact, they are quite different in nature.
A pulsar is a highly dense and compact astronomical object that results from the collapse of a massive star during a supernova explosion. Pulsars are typically only a few kilometers in diameter but have a mass greater than that of our Sun. They are highly magnetized and emit beams of radiation that can be observed as regular pulses of energy as the pulsar rotates.
On the other hand, a quasar (short for "quasi-stellar radio source") is an extremely luminous and distant active galactic nucleus. Quasars are powered by the accretion of mass onto supermassive black holes at the centers of galaxies. They emit vast amounts of energy and can outshine an entire galaxy. Quasars are located at great distances from Earth and are typically billions of light-years away.
In terms of size, quasars are associated with massive galaxies, while pulsars are compact remnants of stellar explosions. Therefore, quasars are much larger in scale compared to pulsars, involving entire galaxies, while pulsars are comparatively tiny objects on a stellar scale.