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How I can get

width

and

height

value using Regex?

Are you asking how to write the regex pattern, or how to use a regex pattern in Kotlin? If you want help writing the pattern, this is probably not the right place to ask

obligatory: https://stackoverflow.com/a/1732454

This website helps me a lot: https://regexr.com/. and this is a great and fun way to learn regex https://regexcrossword.com/ :)

This really doesn't belong here on the Kotlin slack. I'd suggest you either ask this in #random or on Stack overflow so that you're more likely to get a correct response