Take a deep breath and relax bro. When I said that the reticle does not "grow" in size I should have said that the reticle does not cover more of the target you're aiming at. IOW, if your vertical (or horizontal) wire covers say 1/4 of an inch of target at 100 yards at 4X, it won't cover a half inch if you increase the power to 8x at 100 yrds. Make sense now ? That's the beauty of FFP reticles in that they can be used at any power setting and coverage values remain constant. Image and reticle increase or decrease is constant.
