Are Vascular plants or nonvascular plants larger?

Yes. Vascular plants are larger in size

vascular plants are larger because they are able to carry water to the far ends of the plant. This occurs just like veins and arteries carry blood to the body. You can think of a vascular plant as something like a redwood or pinetree, a nonvascular plant would be something like moss. They have no roots, stems, or leaves.