diff --git a/src/Illuminate/Validation/Concerns/FormatsMessages.php b/src/Illuminate/Validation/Concerns/FormatsMessages.php
index f433a5361eec..a5983d111d24 100644
--- a/src/Illuminate/Validation/Concerns/FormatsMessages.php
+++ b/src/Illuminate/Validation/Concerns/FormatsMessages.php
@@ -31,9 +31,11 @@ protected function getMessage($attribute, $rule)
 
         $lowerRule = Str::snake($rule);
 
-        $customMessage = $this->getCustomMessageFromTranslator(
-            $customKey = "validation.custom.{$attribute}.{$lowerRule}"
-        );
+        $customKey = in_array($rule, $this->sizeRules)
+            ? "validation.custom.{$attribute}.{$lowerRule}.{$this->getAttributeType($attribute)}"
+            : "validation.custom.{$attribute}.{$lowerRule}";
+
+        $customMessage = $this->getCustomMessageFromTranslator($customKey);
 
         // First we check for a custom defined validation message for the attribute
         // and rule. This allows the developer to specify specific messages for
diff --git a/tests/Validation/ValidationValidatorTest.php b/tests/Validation/ValidationValidatorTest.php
index d1d3d424dd59..fef4ee42069c 100755
--- a/tests/Validation/ValidationValidatorTest.php
+++ b/tests/Validation/ValidationValidatorTest.php
@@ -598,6 +598,28 @@ public function testCustomValidationLinesAreRespected()
         $this->assertSame('really required!', $v->messages()->first('name'));
     }
 
+    public function testCustomValidationLinesForSizeRules()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $trans->getLoader()->addMessages('en', 'validation', [
+            'required' => 'required!',
+            'custom' => [
+                'name' => [
+                    'between' => [
+                        'numeric' => 'The :attribute must be between :min and :max.',
+                        'file' => 'The :attribute must be between :min and :max kilobytes.',
+                        'string' => 'Some custom message here',
+                        'array' => 'The :attribute must have between :min and :max items.',
+                    ],
+                ],
+            ],
+        ]);
+        $v = new Validator($trans, ['name' => 'Taylor'], ['name' => 'between:10,20']);
+        $this->assertFalse($v->passes());
+        $v->messages()->setFormat(':message');
+        $this->assertSame('Some custom message here', $v->messages()->first('name'));
+    }
+
     public function testCustomValidationLinesAreRespectedWithAsterisks()
     {
         $trans = $this->getIlluminateArrayTranslator();