diff --git a/app/models/attestation_template.rb b/app/models/attestation_template.rb
index ac2600fec..16f463d7f 100644
--- a/app/models/attestation_template.rb
+++ b/app/models/attestation_template.rb
@@ -21,8 +21,10 @@ class AttestationTemplate < ApplicationRecord
   has_one_attached :signature
 
   validates :footer, length: { maximum: 190 }
-  validates :logo, content_type: ['image/png', 'image/jpg', 'image/jpeg'], size: { less_than: 1.megabytes }
-  validates :signature, content_type: ['image/png', 'image/jpg', 'image/jpeg'], size: { less_than: 1.megabytes }
+
+  FILE_MAX_SIZE = 1.megabytes
+  validates :logo, content_type: ['image/png', 'image/jpg', 'image/jpeg'], size: { less_than: FILE_MAX_SIZE }
+  validates :signature, content_type: ['image/png', 'image/jpg', 'image/jpeg'], size: { less_than: FILE_MAX_SIZE }
 
   DOSSIER_STATE = Dossier.states.fetch(:accepte)
 
diff --git a/app/models/avis.rb b/app/models/avis.rb
index 2ab886a18..f64c802c4 100644
--- a/app/models/avis.rb
+++ b/app/models/avis.rb
@@ -27,18 +27,19 @@ class Avis < ApplicationRecord
   has_one :expert, through: :experts_procedure
   has_one :procedure, through: :experts_procedure
 
+  FILE_MAX_SIZE = 20.megabytes
   validates :piece_justificative_file,
     content_type: AUTHORIZED_CONTENT_TYPES,
-    size: { less_than: 20.megabytes }
+    size: { less_than: FILE_MAX_SIZE }
 
   validates :introduction_file,
     content_type: AUTHORIZED_CONTENT_TYPES,
-    size: { less_than: 20.megabytes }
+    size: { less_than: FILE_MAX_SIZE }
 
   validates :email, format: { with: Devise.email_regexp, message: "n'est pas valide" }, allow_nil: true
   validates :claimant, presence: true
-  validates :piece_justificative_file, size: { less_than: 20.megabytes }
-  validates :introduction_file, size: { less_than: 20.megabytes }
+  validates :piece_justificative_file, size: { less_than: FILE_MAX_SIZE }
+  validates :introduction_file, size: { less_than: FILE_MAX_SIZE }
 
   before_validation -> { sanitize_email(:email) }
 
diff --git a/app/models/champs/piece_justificative_champ.rb b/app/models/champs/piece_justificative_champ.rb
index 405274d4e..decc64cfd 100644
--- a/app/models/champs/piece_justificative_champ.rb
+++ b/app/models/champs/piece_justificative_champ.rb
@@ -18,10 +18,10 @@
 #  type_de_champ_id               :integer
 #
 class Champs::PieceJustificativeChamp < Champ
-  MAX_SIZE = 200.megabytes
+  FILE_MAX_SIZE = 200.megabytes
 
   validates :piece_justificative_file,
-    size: { less_than: MAX_SIZE },
+    size: { less_than: FILE_MAX_SIZE },
     if: -> { !type_de_champ.skip_pj_validation }
 
   validates :piece_justificative_file,
diff --git a/app/models/champs/titre_identite_champ.rb b/app/models/champs/titre_identite_champ.rb
index b4e32e141..fc339f30e 100644
--- a/app/models/champs/titre_identite_champ.rb
+++ b/app/models/champs/titre_identite_champ.rb
@@ -18,7 +18,7 @@
 #  type_de_champ_id               :integer
 #
 class Champs::TitreIdentiteChamp < Champ
-  MAX_SIZE = 20.megabytes
+  FILE_MAX_SIZE = 20.megabytes
 
   ACCEPTED_FORMATS = [
     "image/png",
@@ -30,7 +30,7 @@ class Champs::TitreIdentiteChamp < Champ
   #
   validates :piece_justificative_file,
     content_type: ACCEPTED_FORMATS,
-    size: { less_than: MAX_SIZE }
+    size: { less_than: FILE_MAX_SIZE }
 
   def main_value_name
     :piece_justificative_file
diff --git a/app/models/commentaire.rb b/app/models/commentaire.rb
index f68b462a5..3df4c0dc6 100644
--- a/app/models/commentaire.rb
+++ b/app/models/commentaire.rb
@@ -24,9 +24,10 @@ class Commentaire < ApplicationRecord
 
   validates :body, presence: { message: "ne peut être vide" }
 
+  FILE_MAX_SIZE = 20.megabytes
   validates :piece_jointe,
     content_type: AUTHORIZED_CONTENT_TYPES,
-    size: { less_than: 20.megabytes }
+    size: { less_than: FILE_MAX_SIZE }
 
   default_scope { order(created_at: :asc) }
   scope :updated_since?, -> (date) { where('commentaires.updated_at > ?', date) }
diff --git a/app/models/procedure.rb b/app/models/procedure.rb
index 5cfc9b618..0fe05a42c 100644
--- a/app/models/procedure.rb
+++ b/app/models/procedure.rb
@@ -240,6 +240,8 @@ class Procedure < ApplicationRecord
   validates :duree_conservation_dossiers_dans_ds, allow_nil: false, numericality: { only_integer: true, greater_than_or_equal_to: 1, less_than_or_equal_to: MAX_DUREE_CONSERVATION }
   validates :duree_conservation_dossiers_hors_ds, allow_nil: true, numericality: { only_integer: true, greater_than_or_equal_to: 0 }
   validates_with MonAvisEmbedValidator
+
+  FILE_MAX_SIZE = 20.megabytes
   validates :notice, content_type: [
     "application/msword",
     "application/pdf",
@@ -252,7 +254,7 @@ class Procedure < ApplicationRecord
     "image/jpg",
     "image/png",
     "text/plain"
-  ], size: { less_than: 20.megabytes }, if: -> { new_record? || created_at > Date.new(2020, 2, 28) }
+  ], size: { less_than: FILE_MAX_SIZE }, if: -> { new_record? || created_at > Date.new(2020, 2, 28) }
 
   validates :deliberation, content_type: [
     "application/msword",
@@ -263,10 +265,11 @@ class Procedure < ApplicationRecord
     "image/jpg",
     "image/png",
     "text/plain"
-  ], size: { less_than: 20.megabytes }, if: -> { new_record? || created_at > Date.new(2020, 4, 29) }
+  ], size: { less_than: FILE_MAX_SIZE }, if: -> { new_record? || created_at > Date.new(2020, 4, 29) }
 
+  LOGO_MAX_SIZE = 5.megabytes
   validates :logo, content_type: ['image/png', 'image/jpg', 'image/jpeg'],
-    size: { less_than: 5.megabytes },
+    size: { less_than: LOGO_MAX_SIZE },
     if: -> { new_record? || created_at > Date.new(2020, 11, 13) }
 
   validates :api_entreprise_token, jwt_token: true, allow_blank: true
diff --git a/spec/models/champs/piece_justificative_champ_spec.rb b/spec/models/champs/piece_justificative_champ_spec.rb
index 9886224d1..9d3d239b1 100644
--- a/spec/models/champs/piece_justificative_champ_spec.rb
+++ b/spec/models/champs/piece_justificative_champ_spec.rb
@@ -21,7 +21,7 @@ describe Champs::PieceJustificativeChamp do
     subject { champ_pj }
 
     context "by default" do
-      it { is_expected.to validate_size_of(:piece_justificative_file).less_than(Champs::PieceJustificativeChamp::MAX_SIZE) }
+      it { is_expected.to validate_size_of(:piece_justificative_file).less_than(Champs::PieceJustificativeChamp::FILE_MAX_SIZE) }
       it { is_expected.to validate_content_type_of(:piece_justificative_file).rejecting('application/x-ms-dos-executable') }
       it { expect(champ_pj.type_de_champ.skip_pj_validation).to be_falsy }
     end
@@ -29,7 +29,7 @@ describe Champs::PieceJustificativeChamp do
     context "when validation is disabled" do
       before { champ_pj.type_de_champ.update(skip_pj_validation: true) }
 
-      it { is_expected.not_to validate_size_of(:piece_justificative_file).less_than(Champs::PieceJustificativeChamp::MAX_SIZE) }
+      it { is_expected.not_to validate_size_of(:piece_justificative_file).less_than(Champs::PieceJustificativeChamp::FILE_MAX_SIZE) }
     end
 
     context "when content-type validation is disabled" do