H10 bulb size is also known as 9145 size.
This size is more often used for upgrading fog lights with H10 bulb size rather than headlights. Still, no matter what car lights (Low beams, High beams or fog lights) you want to convert, having H10 size of your stock Halogen bulbs means you need exactly this size. If you are not sure about the right bulb size, you can look it up on the bulb itself or in the owner’s manual of your car. These products are designed to meet the requirements of those who want to have their car lights as bright as possible.