The male is much smaller than the female. After mating, the female kills the male. The male spider spins a web alongside the females web, known as the companion web. The female lays her eggs onto this companion web and wraps them up into a sac. This sac can hold from 400 to 1,400 eggs inside. The eggs hatch in autumn, but they remain locked inside until spring. The young spiders in the sac are cannibals, and they eat each other to stay alive — until they are strong enough to break through the sac walls.
Here in this pic you can see a male Signatre spider (Argiope ansuja) which is way smaller in size approaching a female(the large one). The 2nd pic shows the companion web just behind the female spiders web.