diff --git a/app/helpers/sponsors_helper.rb b/app/helpers/sponsors_helper.rb
new file mode 100644
index 00000000..e827c1fe
--- /dev/null
+++ b/app/helpers/sponsors_helper.rb
@@ -0,0 +1,12 @@
+module SponsorsHelper
+  # returns the url to be used for logo on basis of sponsorship level position
+  def get_logo(sponsor)
+    if sponsor.sponsorship_level.position == 1
+      sponsor.logo.url(:first)
+    elsif sponsor.sponsorship_level.position == 2
+      sponsor.logo.url(:second)
+    else
+      sponsor.logo.url(:others)
+    end
+  end
+end
diff --git a/app/models/sponsor.rb b/app/models/sponsor.rb
index 8b360c6d..6b255886 100644
--- a/app/models/sponsor.rb
+++ b/app/models/sponsor.rb
@@ -2,12 +2,20 @@ class Sponsor < ActiveRecord::Base
   belongs_to :sponsorship_level
   belongs_to :conference
   has_attached_file :logo,
-                    styles: { thumb: '100x100>', large: '300x300>' }
+                    styles: { thumb: '100x100>',
+                              first: '320x180>',
+                              second: '320x150>',
+                              others: '320x120>' },
+                    # places logo on a white background to maintain size
+                    convert_options: {
+                      first: '-background white -gravity center -extent 320x180',
+                      second: '-background white -gravity center -extent 320x150',
+                      others: '-background white -gravity center -extent 320x120'
+                    }
 
   validates_attachment_content_type :logo,
                                     content_type: [/jpg/, /jpeg/, /png/, /gif/],
-                                    size: { in: 0..500.kilobytes },
-                                    presence: true
+                                    size: { in: 0..500.kilobytes }
 
-  validates_presence_of :name, :website_url, :sponsorship_level
+  validates_presence_of :name, :website_url, :sponsorship_level, :logo
 end
diff --git a/app/views/conference/_sponsors.html.haml b/app/views/conference/_sponsors.html.haml
index 22db2916..88a4400b 100644
--- a/app/views/conference/_sponsors.html.haml
+++ b/app/views/conference/_sponsors.html.haml
@@ -14,9 +14,8 @@
         .row
           - slice.each do |sponsor|
             .col-md-4.col-sm-4.col-top
-              - if sponsor.logo.present?
-                = link_to(sponsor.website_url, class: 'thumbnail') do
-                  = image_tag sponsor.logo, class: "img-responsive img-sponsor img-sponsor-#{sponsorship_level.position}", title: "#{sponsor.description}"
+              = link_to(sponsor.website_url, class: 'thumbnail') do
+                = image_tag get_logo(sponsor), class: "img-responsive img-sponsor img-sponsor-#{sponsorship_level.position}", title: "#{sponsor.description}"
   -if @conference.contact and !@conference.contact.sponsor_email.blank?
     .row
       .col-md-12