What are the default font sizes (in pixels) for the html heading tags (

Question

What are the default font pixel sizes for the heading (h1-h6) tags?

Answer 1

Size for h1 - h6 tags are different from browser to browser. There is no W3 spec that enforces standard size for heading tags. Each browser has implemented its own.

It is recommended to use a CSS normalizer to make the sizes uniform across all the browsers. You can do this by defining your custom sizes for the tags to override the default browser values.