diff --git a/js/controllers/create.js b/js/controllers/create.js
index 6631dcce9..448b618f7 100644
--- a/js/controllers/create.js
+++ b/js/controllers/create.js
@@ -1,37 +1,5 @@
 'use strict';
 
-
-var valid_pairs = {
-  '1,1': 112,
-  '1,2': 147,
-  '2,2': 220,
-  '1,3': 182,
-  '2,3': 256,
-  '3,3': 329,
-  '1,4': 216,
-  '2,4': 290,
-  '3,4': 363,
-  '4,4': 436,
-  '1,5': 250,
-  '2,5': 324,
-  '3,5': 398,
-  '4,5': 470,
-  '1,6': 284,
-  '2,6': 358,
-  '3,6': 432,
-  '1,7': 318,
-  '2,7': 392,
-  '3,7': 465,
-  '1,8': 353,
-  '2,8': 427,
-  '1,9': 387,
-  '2,9': 461,
-  '1,10': 421,
-  '2,10': 495,
-  '1,11': 455,
-  '1,12': 489
-};
-
 angular.module('copayApp.controllers').controller('CreateController',
   function($scope, $rootScope, $location, $timeout, walletFactory, controllerUtils, Passphrase, backupService, notification) {
     controllerUtils.redirIfLogged();
@@ -49,19 +17,12 @@ angular.module('copayApp.controllers').controller('CreateController',
     }
 
     $scope.totalCopayers = config.wallet.totalCopayers;
-    $scope.TCValues = [];
-    for (var n = 1; n <= config.limits.totalCopayers; n++)
-      $scope.TCValues.push(n);
+    $scope.TCValues = _.range(1, config.limits.totalCopayers + 1);
 
     var updateRCSelect = function(n) {
-      $scope.requiredCopayers = (valid_pairs[[parseInt(n / 2 + 1), n]] > 0 || config.networkName === 'testnet') ?
-        parseInt(n / 2 + 1) : 1;
-      $scope.RCValues = [];
-      for (var m = 1; m <= n; m++) {
-        if (valid_pairs[[m, n]] > 0 || config.networkName === 'testnet') {
-          $scope.RCValues.push(m);
-        }
-      }
+      var maxReq = copay.Wallet.getMaxRequiredCopayers(n);
+      $scope.RCValues = _.range(1, maxReq + 1);
+      $scope.requiredCopayers = Math.min(parseInt(n / 2 + 1), maxReq);
     };
 
     updateRCSelect($scope.totalCopayers);
diff --git a/js/models/Wallet.js b/js/models/Wallet.js
index 590fa609a..0f26b9e4f 100644
--- a/js/models/Wallet.js
+++ b/js/models/Wallet.js
@@ -132,6 +132,21 @@ Wallet.PERSISTED_PROPERTIES = [
   'lastTimestamp',
 ];
 
+Wallet.COPAYER_PAIR_LIMITS = {
+  1: 1,
+  2: 2,
+  3: 3,
+  4: 4,
+  5: 4,
+  6: 3,
+  7: 3,
+  8: 2,
+  9: 2,
+  10: 2,
+  11: 1,
+  12: 1,
+};
+
 /**
  * @desc Retrieve a random id for the wallet
  * @TODO: Discuss changing to a UUID
@@ -151,6 +166,18 @@ Wallet.getRandomNumber = function() {
   return r;
 };
 
+/**
+ * @desc
+ * Get the maximum allowed number of required copayers.
+ * This is a limit imposed by the maximum allowed size of the scriptSig.
+ * @param {number} totalCopayers - the total number of copayers
+ * @return {number}
+ */
+Wallet.getMaxRequiredCopayers = function(totalCopayers) {
+  return Wallet.COPAYER_PAIR_LIMITS[totalCopayers];
+};
+
+
 /**
  * @desc Set the copayer id for the owner of this wallet
  * @param {string} pubkey - the pubkey to set to the {@link Wallet#seededCopayerId} property
diff --git a/test/models/Wallet.js b/test/models/Wallet.js
index 5c60dda16..2155eca83 100644
--- a/test/models/Wallet.js
+++ b/test/models/Wallet.js
@@ -393,6 +393,27 @@ describe('Wallet model', function() {
     w.maxRejectCount().should.equal(2);
   });
 
+  describe('#getMaxRequiredCopayers', function() {
+    it('should return ', function() {
+      var validPairs = {
+        1: 1,
+        2: 2,
+        3: 3,
+        4: 4,
+        5: 4,
+        6: 3,
+        7: 3,
+        8: 2,
+        9: 2,
+        10: 2,
+        11: 1,
+        12: 1,
+      };
+      _.each(validPairs, function(maxReq, total) {
+        Wallet.getMaxRequiredCopayers(total).should.equal(maxReq);
+      })
+    });
+  });
 
   describe('#_onData', function() {
     var w = cachedCreateW();