diff --git a/object/service.proto b/object/service.proto
index dbbb8af..6daad81 100644
--- a/object/service.proto
+++ b/object/service.proto
@@ -496,6 +496,9 @@ message SearchRequest {
     // objects. Most human users expect to get only object they can directly
     // work with. In that case, `$Object:ROOT` filter should be used.
     //
+    // If `match_type` field is numerical, both `value` field and object
+    // attribute MUST be base-10 numbers.
+    //
     // By default `key` field refers to the corresponding object's `Attribute`.
     // Some Object's header fields can also be accessed by adding `$Object:`
     // prefix to the name. Here is the list of fields available via this prefix:
diff --git a/object/types.proto b/object/types.proto
index 1d8a749..7a85fcb 100644
--- a/object/types.proto
+++ b/object/types.proto
@@ -47,6 +47,18 @@ enum MatchType {
 
   // String prefix match
   COMMON_PREFIX = 4;
+
+  // Numerical 'greater than'
+  NUM_GT = 5;
+
+  // Numerical 'greater or equal than'
+  NUM_GE = 6;
+
+  // Numerical 'less than'
+  NUM_LT = 7;
+
+  // Numerical 'less or equal than'
+  NUM_LE = 8;
 }
 
 // Short header fields
diff --git a/proto-docs/object.md b/proto-docs/object.md
index 7913487..c170e5b 100644
--- a/proto-docs/object.md
+++ b/proto-docs/object.md
@@ -771,6 +771,9 @@ container, including Regular object, Tombstones and Storage Group
 objects. Most human users expect to get only object they can directly
 work with. In that case, `$Object:ROOT` filter should be used.
 
+If `match_type` field is numerical, both `value` field and object
+attribute MUST be base-10 numbers.
+
 By default `key` field refers to the corresponding object's `Attribute`.
 Some Object's header fields can also be accessed by adding `$Object:`
 prefix to the name. Here is the list of fields available via this prefix:
@@ -1021,6 +1024,10 @@ Type of match expression
 | STRING_NOT_EQUAL | 2 | Full string mismatch |
 | NOT_PRESENT | 3 | Lack of key |
 | COMMON_PREFIX | 4 | String prefix match |
+| NUM_GT | 5 | Numerical 'greater than' |
+| NUM_GE | 6 | Numerical 'greater or equal than' |
+| NUM_LT | 7 | Numerical 'less than' |
+| NUM_LE | 8 | Numerical 'less or equal than' |