diff --git a/create-card.js b/create-card.js
index 1863365..49de0c8 100644
--- a/create-card.js
+++ b/create-card.js
@@ -88,8 +88,15 @@ class CardCreator {
     this.isInit = false;
   }
 
+  /**
+   * @typedef {Object} CardCreator~CanvasDimensions
+   * @property {number} width The width of the canvas.
+   * @property {number} height The height of the canvas.
+   */
+
   /**
    * The canvas's dimensions.
+   * @type {CardCreator~CanvasDimensions}
    */
   get canvasSize() {
     return {