diff --git a/src/dom/dom.js b/src/dom/dom.js
index a5e1c54a5c..8793874107 100644
--- a/src/dom/dom.js
+++ b/src/dom/dom.js
@@ -3683,6 +3683,13 @@ p5.Element.prototype.size = function (w, h) {
   if (arguments.length === 0) {
     return { width: this.elt.offsetWidth, height: this.elt.offsetHeight };
   } else {
+    if (this instanceof p5.Graphics) {
+      p5._friendlyError(
+        'size() is not supported for p5.Graphics. Use resizeCanvas() instead.',
+        'p5.Graphics.size'
+      );
+      return this;
+    }
     let aW = w;
     let aH = h;
     const AUTO = p5.prototype.AUTO;
diff --git a/test/unit/core/p5.Graphics.js b/test/unit/core/p5.Graphics.js
index 216f4e9d26..3aa171c07a 100644
--- a/test/unit/core/p5.Graphics.js
+++ b/test/unit/core/p5.Graphics.js
@@ -185,6 +185,17 @@ suite('Graphics', function() {
     });
   });
 
+  suite('p5.Graphics.size()', function () {
+    test('it shows error when size() is called', function () {
+      var graph = myp5.createGraphics(100, 100);
+      var consoleStub = sinon.stub(console, 'error');
+      graph.size(50, 50);
+      assert(consoleStub.called);
+      assert.include(consoleStub.getCall(0).args[0], 'resizeCanvas()');
+      consoleStub.restore();
+    });
+  });
+
   suite('p5.Graphics.remove()', function() {
     test('it sets properties to undefined after removal', function() {
       var graph = myp5.createGraphics(10, 17);