According to what I read in this threadhttps://linustechtips.com/main/topic/435570-do-amd-products-run-hotter-than-intel/
AMD processors tend to run hotter but Intel processors have higher peak temperatures.
To get an idea of sizes, there's an article showing AMD coolers herehttps://www.anandtech.com/Show/Index/105...-amd-vs-evo-212
and here for AMD Phenomhttp://www.silentpcreview.com/amd-phenom-coolers
and here for AMD Ryzenhttp://www.relaxedtech.com/reviews/amd/wraith-max-and-wraith-spire-cooler/1
If your computer has temperature sensors for the CPU, you can get an idea of whether your processor is being cooled adequately. If you're running processor-intensive games or other processor-intensive applications, you may want to replace the stock cooler with one that has greater cooling power.
The cooling power of the computer case can also affect how well the CPU cooler can cool. If your computer case tends to get hot inside, the CPU cooler has to have more cooling power.