diff --git a/core/src/components/button/button.ionic.scss b/core/src/components/button/button.ionic.scss
index 47da7e11cb..b266cfaa10 100644
--- a/core/src/components/button/button.ionic.scss
+++ b/core/src/components/button/button.ionic.scss
@@ -109,7 +109,18 @@
 ::slotted(ion-icon[slot="start"]),
 ::slotted(ion-icon[slot="end"]),
 ::slotted(ion-icon[slot="icon-only"]) {
-  font-size: 1em;
+  font-size: px-to-rem(16);
+}
+
+:host(.button-xsmall),
+:host(.button-small),
+:host(.button-large),
+:host(.button-xlarge) {
+  ::slotted(ion-icon[slot="start"]),
+  ::slotted(ion-icon[slot="end"]),
+  ::slotted(ion-icon[slot="icon-only"]) {
+    font-size: 1em;
+  }
 }
 
 /* Button extra small */