How big are wormholes?

Could you please elaborate on the dimensions of wormholes? Are they microscopic in size or vast enough to swallow entire galaxies? Could you provide an estimation of their potential scale, or is it still a mystery within the realm of theoretical physics? Would the size of a wormhole depend on the properties of the spacetime it connects, or is it a constant regardless of the circumstances? I'm curious to know if there's any consensus among physicists regarding the potential size range of these hypothetical bridges between different regions of the universe.