diff --git a/core/api.txt b/core/api.txt
index 9d4ad6a236..bfe6d19b2f 100644
--- a/core/api.txt
+++ b/core/api.txt
@@ -382,6 +382,7 @@ ion-fab-button,css-prop,--border-radius
 ion-fab-button,css-prop,--border-style
 ion-fab-button,css-prop,--border-width
 ion-fab-button,css-prop,--box-shadow
+ion-fab-button,css-prop,--close-icon-font-size
 ion-fab-button,css-prop,--color
 ion-fab-button,css-prop,--color-activated
 ion-fab-button,css-prop,--color-focused
diff --git a/core/src/components/fab-button/fab-button.ios.scss b/core/src/components/fab-button/fab-button.ios.scss
index a1d8e03453..2147acf63d 100755
--- a/core/src/components/fab-button/fab-button.ios.scss
+++ b/core/src/components/fab-button/fab-button.ios.scss
@@ -15,6 +15,7 @@
   --color: #{$fab-ios-text-color};
   --box-shadow: #{$fab-ios-box-shadow};
   --transition: #{$fab-ios-transition};
+  --close-icon-font-size: #{$fab-ios-icon-font-size};
 }
 
 :host(.ion-activated) {
@@ -23,11 +24,11 @@
   --transition: #{$fab-ios-transition-activated};
 }
 
-::slotted(ion-icon),
-.close-icon {
+::slotted(ion-icon) {
   font-size: $fab-ios-icon-font-size;
 }
 
+
 // FAB buttons in a list
 // --------------------------------------------------
 
@@ -112,4 +113,4 @@
   :host(.ion-color.ion-activated.fab-button-translucent) .button-native {
     background: #{current-color(base)};
   }
-}
\ No newline at end of file
+}
diff --git a/core/src/components/fab-button/fab-button.md.scss b/core/src/components/fab-button/fab-button.md.scss
index 701aa83786..a459b52e9c 100755
--- a/core/src/components/fab-button/fab-button.md.scss
+++ b/core/src/components/fab-button/fab-button.md.scss
@@ -21,14 +21,14 @@
     opacity 15ms linear 30ms,
     transform 270ms cubic-bezier(0, 0, .2, 1) 0ms
   };
+  --close-icon-font-size: #{$fab-md-icon-font-size};
 }
 
 :host(.ion-activated) {
   --box-shadow: #{$fab-md-box-shadow-activated};
 }
 
-::slotted(ion-icon),
-.close-icon {
+::slotted(ion-icon) {
   font-size: $fab-md-icon-font-size;
 }
 
diff --git a/core/src/components/fab-button/fab-button.scss b/core/src/components/fab-button/fab-button.scss
index 981c6978ed..afc63da75e 100755
--- a/core/src/components/fab-button/fab-button.scss
+++ b/core/src/components/fab-button/fab-button.scss
@@ -20,6 +20,8 @@
    *
    * @prop --transition: Transition of the button
    *
+   * @prop --close-icon-font-size: Font size of the close icon
+   *
    * @prop --border-radius: Border radius of the button
    * @prop --border-width: Border width of the button
    * @prop --border-style: Border style of the button
@@ -222,11 +224,14 @@
   transition: all ease-in-out 300ms;
   transition-property: transform, opacity;
 
+  font-size: var(--close-icon-font-size);
+
   opacity: 0;
 
   z-index: 1;
 }
 
+
 // FAB Animation
 // --------------------------------------------------
 
diff --git a/core/src/components/fab-button/readme.md b/core/src/components/fab-button/readme.md
index e0d8232f9b..3c395ca851 100644
--- a/core/src/components/fab-button/readme.md
+++ b/core/src/components/fab-button/readme.md
@@ -180,6 +180,7 @@ export class FabButtonExample {
 | `--border-style`                 | Border style of the button                                                                                |
 | `--border-width`                 | Border width of the button                                                                                |
 | `--box-shadow`                   | Box shadow of the button                                                                                  |
+| `--close-icon-font-size`         | Font size of the close icon                                                                               |
 | `--color`                        | Text color of the button                                                                                  |
 | `--color-activated`              | Text color of the button when pressed                                                                     |
 | `--color-focused`                | Text color of the button when focused with the tab key                                                    |