diff --git a/COMPONENT_INDEX.md b/COMPONENT_INDEX.md
index 3924be71..ea222df9 100644
--- a/COMPONENT_INDEX.md
+++ b/COMPONENT_INDEX.md
@@ -4048,7 +4048,7 @@ None.
 | ref         | No       | <code>let</code> | Yes      | <code>null &#124; HTMLTextAreaElement</code> | <code>null</code>                                | Obtain a reference to the textarea HTML element |
 | value       | No       | <code>let</code> | Yes      | <code>string</code>                          | <code>""</code>                                  | Specify the textarea value                      |
 | placeholder | No       | <code>let</code> | No       | <code>string</code>                          | <code>""</code>                                  | Specify the placeholder text                    |
-| cols        | No       | <code>let</code> | No       | <code>number</code>                          | <code>50</code>                                  | Specify the number of cols                      |
+| cols        | No       | <code>let</code> | No       | <code>number</code>                          | <code>undefined</code>                           | Specify the number of cols                      |
 | rows        | No       | <code>let</code> | No       | <code>number</code>                          | <code>4</code>                                   | Specify the number of rows                      |
 | maxCount    | No       | <code>let</code> | No       | <code>number</code>                          | <code>undefined</code>                           | Specify the max character count                 |
 | light       | No       | <code>let</code> | No       | <code>boolean</code>                         | <code>false</code>                               | Set to `true` to enable the light variant       |
diff --git a/docs/src/COMPONENT_API.json b/docs/src/COMPONENT_API.json
index 39241a60..163823f2 100644
--- a/docs/src/COMPONENT_API.json
+++ b/docs/src/COMPONENT_API.json
@@ -12454,7 +12454,6 @@
           "kind": "let",
           "description": "Specify the number of cols",
           "type": "number",
-          "value": "50",
           "isFunction": false,
           "isFunctionDeclaration": false,
           "isRequired": false,
diff --git a/src/TextArea/TextArea.svelte b/src/TextArea/TextArea.svelte
index 0e395931..bd11d718 100644
--- a/src/TextArea/TextArea.svelte
+++ b/src/TextArea/TextArea.svelte
@@ -5,8 +5,11 @@
   /** Specify the placeholder text */
   export let placeholder = "";
 
-  /** Specify the number of cols */
-  export let cols = 50;
+  /**
+   * Specify the number of cols
+   * @type {number}
+   * */
+  export let cols = undefined;
 
   /** Specify the number of rows */
   export let rows = 4;
@@ -110,6 +113,7 @@
       class:bx--text-area--light="{light}"
       class:bx--text-area--invalid="{invalid}"
       maxlength="{maxCount ?? undefined}"
+      style="{cols ? '' : 'width: 100%;'}"
       {...$$restProps}
       on:change
       on:input
diff --git a/types/TextArea/TextArea.svelte.d.ts b/types/TextArea/TextArea.svelte.d.ts
index 6b1fa440..acb07907 100644
--- a/types/TextArea/TextArea.svelte.d.ts
+++ b/types/TextArea/TextArea.svelte.d.ts
@@ -18,7 +18,7 @@ export interface TextAreaProps extends RestProps {
 
   /**
    * Specify the number of cols
-   * @default 50
+   * @default undefined
    */
   cols?: number;