Ask Me Anything Breadcrumbs and H tag usage

[Venkatweetz]

One of my ecommerce website there is a h2 tag in every breadcrumbs (always the actual product name), and after the breadcrumb, in the text block there is a h1 tag with also the product name, so with the keyword.

 

[Graybeard]

How do you define those values in your css?
I think that might look rather rude in HTML