[ruby-on-rails] How do I loop over a hash of hashes?

I have this hash:

 h
 => {"67676.mpa"=>{:link=>"pool/sdafdsaff", :size=>4556}} 

>  h.each do |key, value|
>     puts key
>   puts value
>   end
67676.mpa
linkpool/sdafdsaffsize4556

How do I access the separate values in the value hash on the loop?