Fractional deviation in radius vs. core entropy for different masses and irradiation. These curves give a sense of how much the radius changes during evolution. Solid red, dotted black, and dashed blue lines represent masses ﹩M/ M_{\mathrm{J}\,}=0.5﹩, 1.0, and 1.5, respectively. Each group of lines represents ﹩T_{\mathrm{deep}\,}=500,1000,\ldots ,3500﹩ K, from left to right. Only ages in the range 0.1–10 Gyr are shown for each curve.