What is the electrical difference between RG-58 and RG-213 coaxial cable?

Both RG-58 and RG-213 are common 50-ohm coaxial cables used in amateur radio, but they differ significantly in their physical size and electrical performance. RG-58 is a thinner, more flexible cable, while RG-213 is much thicker, measuring about half an inch in diameter. The larger diameter of RG-213 allows for a much thicker center conductor and a greater volume of dielectric material. This physical difference electrically translates to lower signal loss (attenuation) per foot compared to RG-58 when used at the exact same frequency. Furthermore, because of its larger size and lower loss, RG-213 can handle significantly higher power levels than RG-58. This makes the distractor claiming that RG-58 handles higher power completely backwards.