diff --git a/packages/components/src/font-size-picker/font-size-picker-select.tsx b/packages/components/src/font-size-picker/font-size-picker-select.tsx
index b33c382f3393e4..fcc80355ddd19a 100644
--- a/packages/components/src/font-size-picker/font-size-picker-select.tsx
+++ b/packages/components/src/font-size-picker/font-size-picker-select.tsx
@@ -20,21 +20,8 @@ const DEFAULT_OPTION: FontSizePickerSelectOption = {
 	value: undefined,
 };
 
-const CUSTOM_OPTION: FontSizePickerSelectOption = {
-	key: 'custom',
-	name: __( 'Custom' ),
-};
-
 const FontSizePickerSelect = ( props: FontSizePickerSelectProps ) => {
-	const {
-		__next40pxDefaultSize,
-		fontSizes,
-		value,
-		disableCustomFontSizes,
-		size,
-		onChange,
-		onSelectCustom,
-	} = props;
+	const { __next40pxDefaultSize, fontSizes, value, size, onChange } = props;
 
 	const areAllSizesSameUnit = !! getCommonSizeUnit( fontSizes );
 
@@ -59,12 +46,10 @@ const FontSizePickerSelect = ( props: FontSizePickerSelectProps ) => {
 				hint,
 			};
 		} ),
-		...( disableCustomFontSizes ? [] : [ CUSTOM_OPTION ] ),
 	];
 
-	const selectedOption = value
-		? options.find( ( option ) => option.value === value ) ?? CUSTOM_OPTION
-		: DEFAULT_OPTION;
+	const selectedOption =
+		options.find( ( option ) => option.value === value ) ?? DEFAULT_OPTION;
 
 	return (
 		<CustomSelectControl
@@ -86,11 +71,7 @@ const FontSizePickerSelect = ( props: FontSizePickerSelectProps ) => {
 			}: {
 				selectedItem: FontSizePickerSelectOption;
 			} ) => {
-				if ( selectedItem === CUSTOM_OPTION ) {
-					onSelectCustom();
-				} else {
-					onChange( selectedItem.value );
-				}
+				onChange( selectedItem.value );
 			} }
 			size={ size }
 		/>