contacts_controller

  def shipping_label
    @from_address = Setting.find_by_name("shipping_from_address").address
    @to_address = Address.find(params[:file_name].split("_").last)
    
    prawnto :prawn => {
              :page_layout => :landscape, 
              :page_size => [79.2, 252.0],
              :left_margin => 0,
              :right_margin => 0,
              :top_margin => 0,
              :bottom_margin => 0 }
  end

routes.rb

  map.shipping_label 'contacts/shipping_label/:file_name.:format', :controller => 'contacts', :action => 'shipping_label'

shipping_label.pdf.prawn

address = @to_address # for some weird reason @to_address is null inside the block yet setting a local variable to it outside of the block works..  this is very weird.
from = @from_address

pdf.instance_eval do 

    font_size 7
  
    bounding_box [0,79], :width => 100, :height => 79 do
      padded_box 5 do
        text from.label
        text [from.street_1, from.street_2].join(" ")
        text [from.city, from.region.abbreviation].join(", ")
        text from.country.name
      end
    end
    
    font_size 9
    bounding_box [100,59], :width => 152, :height => 59 do
      padded_box 5 do 
        text address.contact.full_name
        text [address.street_1, address.street_2].join(" ")
        text [address.city, address.region.abbreviation].join(", ")
        text address.country.name
      end
    end
    
end

view

			<%- @contact.addresses.map_with_index do |address, idx| -%>
				<tr class="show">
					<%= content_tag :th, @contact.address.size > 1 ? "Addresses:" : "Address:", :rowspan => @contact.addresses.size if idx.zero? %>
					<td><%= address.multi_line_with_breaks %><td>
					<td class="action"><%= link_to 'Generate Label', shipping_label_path( :format => 'pdf', :file_name => "#{@contact.full_name.underscorize}_#{address.id}") %></td>
				</tr>
			<%- end -%>