diff --git a/lib/ios_icon_generator/cli/commands/mask.rb b/lib/ios_icon_generator/cli/commands/mask.rb
index 4db5eca..3db1c3f 100644
--- a/lib/ios_icon_generator/cli/commands/mask.rb
+++ b/lib/ios_icon_generator/cli/commands/mask.rb
@@ -39,8 +39,8 @@ class Icon < Hanami::CLI::Command
           option :symbol_color, default: '#7F0000', desc: 'The color of the symbol to use to generate the mask.'
           option :font, default: 'Helvetica', desc: 'The font to use to generate the symbol.'
           option :file, default: nil, desc: 'The path to an image representing the symbol to use to generate the mask.'
-          option :x_size_ratio, type: :float, default: 0.46, desc: 'The x offset of the size of the mask.'
-          option :y_size_ratio, type: :float, default: 0.46, desc: 'The y offset of the size of the mask.'
+          option :x_size_ratio, type: :float, default: 0.54, desc: 'The x offset of the size of the mask.'
+          option :y_size_ratio, type: :float, default: 0.54, desc: 'The y offset of the size of the mask.'
           option :size_offset, type: :float, default: 0.12, desc: 'The size offset to use when applying the symbol. 0.0 means it\'s scale to the full image, 1.0 means the symbol has the full size of the logo.'
           option :x_offset, type: :float, default: 0.11, desc: 'The x offset to use when applying the symbol. 0.0 means bottom, 1.0 means top.'
           option :y_offset, type: :float, default: 0.11, desc: 'The y offset to use when applying the symbol. 0.0 means left, 1.0 means top.'
diff --git a/lib/ios_icon_generator/cli/commands/stub.rb b/lib/ios_icon_generator/cli/commands/stub.rb
index 70c20ea..ecd6185 100644
--- a/lib/ios_icon_generator/cli/commands/stub.rb
+++ b/lib/ios_icon_generator/cli/commands/stub.rb
@@ -34,10 +34,10 @@ class Stub < Hanami::CLI::Command
         option :font, default: 'Helvetica', desc: 'The font to use to generate the symbol.'
         option :symbol_color, default: '#7F0000', desc: 'The color of the symbol to use to generate the mask.'
         option :stroke_color, default: '#000000', desc: 'The stroke color of the mask'
-        option :stroke_width_offset, type: :float, default: 0.1, desc: 'The width of the stroke used when generating the symbol.'
+        option :stroke_width_offset, type: :float, default: 0.0, desc: 'The width of the stroke used when generating the symbol.'
         option :size_offset, type: :float, default: 0.5, desc: 'The point size used for the symbol, relative to the height of the icon. Values over 0.5 are not recommended.'
         option :x_offset, type: :float, default: 0.0, desc: 'The x offset to use when applying the symbol. 0.0 means bottom, 1.0 means top.'
-        option :y_offset, type: :float, default: 0.0, desc: 'The y offset to use when applying the symbol. 0.0 means left, 1.0 means top.'
+        option :y_offset, type: :float, default: -0.05, desc: 'The y offset to use when applying the symbol. 0.0 means left, 1.0 means top.'
         option :type, type: :array, default: %w[iphone], desc: 'Which target to generate the icons for. Can be "iphone", "ipad", "watch", "mac" or "carplay" or a combination of any of them, or "imessage"'
         option :parallel_processes, type: :integer, default: -1, desc: 'Number of processes to use to process the files. Defaults to -1, meaning the number of cores the machine. \
           Set to 0 to disable parallel processing.'
diff --git a/lib/ios_icon_generator/helpers/generate_icon.rb b/lib/ios_icon_generator/helpers/generate_icon.rb
index 4ffcd06..20c7060 100644
--- a/lib/ios_icon_generator/helpers/generate_icon.rb
+++ b/lib/ios_icon_generator/helpers/generate_icon.rb
@@ -130,7 +130,7 @@ def self.generate_icon(icon_path:, output_folder:, types:, parallel_processes: n
         },
       }
 
-      File.write(File.join(appiconset_path, 'Contents.json'), JSON.generate(contents_json))
+      File.write(File.join(appiconset_path, 'Contents.json'), JSON.pretty_generate(contents_json))
 
       progress&.call(total - 1, total)
     end
diff --git a/lib/ios_icon_generator/helpers/mask_icon.rb b/lib/ios_icon_generator/helpers/mask_icon.rb
index a62558e..c172305 100644
--- a/lib/ios_icon_generator/helpers/mask_icon.rb
+++ b/lib/ios_icon_generator/helpers/mask_icon.rb
@@ -31,8 +31,8 @@ def self.mask_icon(
         symbol: 'b',
         symbol_color: '#7F0000',
         font: 'Helvetica',
-        x_size_ratio: 0.5478515625,
-        y_size_ratio: 0.5478515625,
+        x_size_ratio: 0.54,
+        y_size_ratio: 0.54,
         size_offset: 0.0,
         x_offset: 0.0,
         y_offset: 0.0,
@@ -77,7 +77,7 @@ def self.mask_icon(
         draw_shape =
           case mask[:shape]
           when :triangle
-            "-draw \"polyline 0,#{mask_size_height} 0,#{height} #{width - mask_size_width},#{height}\""
+            "-draw \"polyline -#{width},#{height - mask_size_height} 0,#{height - mask_size_height} #{mask_size_width},#{height} #{mask_size_width},#{height * 2.0} -#{width},#{height * 2.0}\""
           when :square
             "-draw \"rectangle -#{width},#{height * 2.0} #{mask_size_height},#{width - mask_size_width}\""
           else
@@ -95,7 +95,7 @@ def self.mask_icon(
         image['filename'] = icon_output
       end
 
-      File.write(File.join(output_folder, 'Contents.json'), JSON.generate(json_content))
+      File.write(File.join(output_folder, 'Contents.json'), JSON.pretty_generate(json_content))
     end
   end
 end