diff --git a/app/models/form/admin_settings.rb b/app/models/form/admin_settings.rb
index 85b913cf8..515909d5c 100644
--- a/app/models/form/admin_settings.rb
+++ b/app/models/form/admin_settings.rb
@@ -73,6 +73,8 @@ class Form::AdminSettings
     authorized_fetch: :authorized_fetch_mode?,
   }.freeze
 
+  DESCRIPTION_LIMIT = 200
+
   attr_accessor(*KEYS)
 
   validates :registrations_mode, inclusion: { in: %w(open approved none) }, if: -> { defined?(@registrations_mode) }
@@ -82,7 +84,7 @@ class Form::AdminSettings
   validates :show_domain_blocks, inclusion: { in: %w(disabled users all) }, if: -> { defined?(@show_domain_blocks) }
   validates :show_domain_blocks_rationale, inclusion: { in: %w(disabled users all) }, if: -> { defined?(@show_domain_blocks_rationale) }
   validates :media_cache_retention_period, :content_cache_retention_period, :backups_retention_period, numericality: { only_integer: true }, allow_blank: true, if: -> { defined?(@media_cache_retention_period) || defined?(@content_cache_retention_period) || defined?(@backups_retention_period) }
-  validates :site_short_description, length: { maximum: 200 }, if: -> { defined?(@site_short_description) }
+  validates :site_short_description, length: { maximum: DESCRIPTION_LIMIT }, if: -> { defined?(@site_short_description) }
   validates :status_page_url, url: true, allow_blank: true
   validate :validate_site_uploads
 
diff --git a/app/views/admin/settings/branding/show.html.haml b/app/views/admin/settings/branding/show.html.haml
index e03c16a25..62e9c7245 100644
--- a/app/views/admin/settings/branding/show.html.haml
+++ b/app/views/admin/settings/branding/show.html.haml
@@ -25,7 +25,7 @@
   .fields-group
     = f.input :site_short_description,
               as: :text,
-              input_html: { rows: 2, maxlength: 200 },
+              input_html: { rows: 2, maxlength: Form::AdminSettings::DESCRIPTION_LIMIT },
               wrapper: :with_block_label
 
   .fields-row
diff --git a/app/views/auth/registrations/new.html.haml b/app/views/auth/registrations/new.html.haml
index 1e5aac297..d58f1ccf4 100644
--- a/app/views/auth/registrations/new.html.haml
+++ b/app/views/auth/registrations/new.html.haml
@@ -21,7 +21,7 @@
     = f.simple_fields_for :account do |ff|
       = ff.input :username,
                  append: "@#{site_hostname}",
-                 input_html: { 'aria-label': t('simple_form.labels.defaults.username'), autocomplete: 'off', placeholder: t('simple_form.labels.defaults.username'), pattern: '[a-zA-Z0-9_]+', maxlength: 30 },
+                 input_html: { 'aria-label': t('simple_form.labels.defaults.username'), autocomplete: 'off', placeholder: t('simple_form.labels.defaults.username'), pattern: '[a-zA-Z0-9_]+', maxlength: Account::USERNAME_LENGTH_LIMIT },
                  label: false,
                  required: true,
                  wrapper: :with_label
diff --git a/app/views/disputes/strikes/show.html.haml b/app/views/disputes/strikes/show.html.haml
index 2bfecebbf..150dc0675 100644
--- a/app/views/disputes/strikes/show.html.haml
+++ b/app/views/disputes/strikes/show.html.haml
@@ -76,7 +76,7 @@
 
   = simple_form_for(@appeal, url: disputes_strike_appeal_path(@strike)) do |f|
     .fields-group
-      = f.input :text, wrapper: :with_label, input_html: { maxlength: 500 }
+      = f.input :text, wrapper: :with_label, input_html: { maxlength: Appeal::TEXT_LENGTH_LIMIT }
 
     .actions
       = f.button :button, t('disputes.strikes.appeals.submit'), type: :submit
diff --git a/app/views/settings/profiles/show.html.haml b/app/views/settings/profiles/show.html.haml
index 9790df7d0..8fb213251 100644
--- a/app/views/settings/profiles/show.html.haml
+++ b/app/views/settings/profiles/show.html.haml
@@ -15,10 +15,10 @@
   .fields-row
     .fields-row__column.fields-row__column-6
       .fields-group
-        = f.input :display_name, wrapper: :with_block_label, input_html: { maxlength: 30, data: { default: @account.username } }
+        = f.input :display_name, wrapper: :with_block_label, input_html: { maxlength: Account::DISPLAY_NAME_LENGTH_LIMIT, data: { default: @account.username } }
 
       .fields-group
-        = f.input :note, wrapper: :with_block_label, input_html: { maxlength: 500 }
+        = f.input :note, wrapper: :with_block_label, input_html: { maxlength: Account::NOTE_LENGTH_LIMIT }
 
     .fields-row__column.fields-group.fields-row__column-6
       .input.with_block_label
@@ -27,8 +27,8 @@
 
         = f.simple_fields_for :fields do |fields_f|
           .row
-            = fields_f.input :name, placeholder: t('simple_form.labels.account.fields.name'), input_html: { maxlength: 255 }
-            = fields_f.input :value, placeholder: t('simple_form.labels.account.fields.value'), input_html: { maxlength: 255 }
+            = fields_f.input :name, placeholder: t('simple_form.labels.account.fields.name'), input_html: { maxlength: Account::Field::MAX_CHARACTERS_LOCAL }
+            = fields_f.input :value, placeholder: t('simple_form.labels.account.fields.value'), input_html: { maxlength: Account::Field::MAX_CHARACTERS_LOCAL }
 
   .fields-row
     .fields-row__column.fields-row__column-6