I downloaded a few textures, like a ground cobblestone texture and a brick wall texture etc, but my problem lies when I add the texture to say the ground or a wall I made. for example the brick texture, if I add it to a small plane it looks fine, but the problem is when I make the wall larger, it stretches the texture so the wall is large but theres still only about 6-7 huge bricks in it! Is there a way around this somehow so I can get a lot of nice small bricks? I know nothing about creating textures and I dont have photoshop etc (only MS Paint!).

Thanks