Insurance coverage for dent repair depends on several different factors. These include what caused the dent, your insurance coverage, and whether you have met your deductible.
Collision coverage should pay to fix the dent if it occurred in a motor vehicle crash. If the dent was caused by something other than a collision (such as adverse weather, a falling tree, etc.), you will need to turn to comprehensive auto insurance for coverage.
The size of the dent doesn’t generally affect whether insurance will pay to fix it. Coverage is dependent on what insurance you have and how the damage occurred.