diff --git a/app/src/main/res/layout/activity_call.xml b/app/src/main/res/layout/activity_call.xml
index e28fe652..5e2dd1d7 100644
--- a/app/src/main/res/layout/activity_call.xml
+++ b/app/src/main/res/layout/activity_call.xml
@@ -165,7 +165,7 @@
             android:layout_height="@dimen/dialpad_button_size"
             android:background="@drawable/circle_background"
             android:contentDescription="@string/turn_microphone_off"
-            android:padding="@dimen/dialpad_button_padding"
+            android:padding="@dimen/activity_margin"
             android:src="@drawable/ic_microphone_off_vector"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toStartOf="@+id/call_toggle_speaker"
@@ -179,7 +179,7 @@
             android:layout_height="@dimen/dialpad_button_size"
             android:background="@drawable/circle_background"
             android:contentDescription="@string/turn_speaker_on"
-            android:padding="@dimen/dialpad_button_padding"
+            android:padding="@dimen/activity_margin"
             android:src="@drawable/ic_volume_up_vector"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toStartOf="@+id/call_dialpad"
@@ -193,7 +193,7 @@
             android:layout_height="@dimen/dialpad_button_size"
             android:background="@drawable/circle_button_background_ripple"
             android:contentDescription="@string/show_dialpad"
-            android:padding="@dimen/dialpad_button_padding"
+            android:padding="@dimen/activity_margin"
             android:src="@drawable/ic_dialpad_vector"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
@@ -208,7 +208,7 @@
             android:layout_marginTop="@dimen/big_margin"
             android:background="@drawable/circle_background"
             android:contentDescription="@string/hold_call"
-            android:padding="@dimen/dialpad_button_padding"
+            android:padding="@dimen/activity_margin"
             android:src="@drawable/ic_pause_vector"
             app:layout_constraintEnd_toEndOf="@+id/call_toggle_microphone"
             app:layout_constraintStart_toStartOf="@+id/call_toggle_microphone"
@@ -221,7 +221,7 @@
             android:layout_marginTop="@dimen/big_margin"
             android:background="@drawable/circle_button_background_ripple"
             android:contentDescription="@string/call_add"
-            android:padding="@dimen/dialpad_button_padding"
+            android:padding="@dimen/activity_margin"
             android:src="@drawable/ic_add_call_vector"
             app:layout_constraintEnd_toEndOf="@+id/call_toggle_speaker"
             app:layout_constraintStart_toStartOf="@+id/call_toggle_speaker"
@@ -234,7 +234,7 @@
             android:layout_marginTop="@dimen/big_margin"
             android:background="@drawable/circle_button_background_ripple"
             android:contentDescription="@string/conference_manage"
-            android:padding="@dimen/dialpad_button_padding"
+            android:padding="@dimen/activity_margin"
             android:src="@drawable/ic_people_vector"
             android:visibility="gone"
             app:layout_constraintEnd_toEndOf="@+id/call_dialpad"
@@ -249,7 +249,7 @@
             android:layout_marginTop="@dimen/big_margin"
             android:background="@drawable/circle_button_background_ripple"
             android:contentDescription="@string/call_swap"
-            android:padding="@dimen/dialpad_button_padding"
+            android:padding="@dimen/activity_margin"
             android:src="@drawable/ic_call_swap_vector"
             app:layout_constraintEnd_toEndOf="@+id/call_toggle_microphone"
             app:layout_constraintHorizontal_bias="0.5"
@@ -263,7 +263,7 @@
             android:layout_marginTop="@dimen/big_margin"
             android:background="@drawable/circle_button_background_ripple"
             android:contentDescription="@string/call_merge"
-            android:padding="@dimen/dialpad_button_padding"
+            android:padding="@dimen/activity_margin"
             android:src="@drawable/ic_call_merge_vector"
             app:layout_constraintEnd_toEndOf="@+id/call_toggle_speaker"
             app:layout_constraintHorizontal_bias="0.5"
diff --git a/app/src/main/res/values-hdpi/dimens.xml b/app/src/main/res/values-hdpi/dimens.xml
deleted file mode 100644
index 000cf440..00000000
--- a/app/src/main/res/values-hdpi/dimens.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <dimen name="dialpad_button_size">50dp</dimen>
-    <dimen name="dialpad_button_padding">12dp</dimen>
-    <dimen name="dialpad_button_size_small">50dp</dimen>
-    <dimen name="incoming_call_arrow_size">50dp</dimen>
-    <dimen name="incoming_call_button_size">72dp</dimen>
-    <dimen name="call_notification_button_size">40dp</dimen>
-    <dimen name="incoming_call_avatar_size">94dp</dimen>
-</resources>
diff --git a/app/src/main/res/values-sw480dp/dimens.xml b/app/src/main/res/values-sw480dp/dimens.xml
deleted file mode 100644
index 1c538144..00000000
--- a/app/src/main/res/values-sw480dp/dimens.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <dimen name="dialpad_button_size">80dp</dimen>
-    <dimen name="dialpad_button_padding">16dp</dimen>
-    <dimen name="dialpad_button_size_small">60dp</dimen>
-    <dimen name="incoming_call_arrow_size">60dp</dimen>
-    <dimen name="incoming_call_button_size">80dp</dimen>
-    <dimen name="call_notification_button_size">50dp</dimen>
-    <dimen name="incoming_call_avatar_size">120dp</dimen>
-
-    <dimen name="dialpad_text_size">34sp</dimen>
-    <dimen name="caller_name_text_size">40sp</dimen>
-    <dimen name="call_status_text_size">28sp</dimen>
-</resources>
diff --git a/app/src/main/res/values-sw720dp/dimens.xml b/app/src/main/res/values-sw720dp/dimens.xml
deleted file mode 100644
index 990ad67d..00000000
--- a/app/src/main/res/values-sw720dp/dimens.xml
+++ /dev/null
@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <dimen name="dialpad_button_size">96dp</dimen>
-    <dimen name="dialpad_button_padding">20dp</dimen>
-    <dimen name="dialpad_button_size_small">64dp</dimen>
-    <dimen name="incoming_call_arrow_size">64dp</dimen>
-    <dimen name="incoming_call_button_size">80dp</dimen>
-    <dimen name="call_notification_button_size">56dp</dimen>
-    <dimen name="incoming_call_avatar_size">160dp</dimen>
-
-    <dimen name="dialpad_text_size">42sp</dimen>
-    <dimen name="caller_name_text_size">46sp</dimen>
-    <dimen name="call_status_text_size">30sp</dimen>
-</resources>
diff --git a/app/src/main/res/values-xhdpi/dimens.xml b/app/src/main/res/values-xhdpi/dimens.xml
deleted file mode 100644
index 60551520..00000000
--- a/app/src/main/res/values-xhdpi/dimens.xml
+++ /dev/null
@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <dimen name="dialpad_button_size">72dp</dimen>
-    <dimen name="dialpad_button_padding">16dp</dimen>
-    <dimen name="dialpad_button_size_small">50dp</dimen>
-    <dimen name="incoming_call_arrow_size">50dp</dimen>
-    <dimen name="incoming_call_button_size">72dp</dimen>
-    <dimen name="call_notification_button_size">40dp</dimen>
-    <dimen name="incoming_call_avatar_size">120dp</dimen>
-</resources>
diff --git a/app/src/main/res/values/dimens.xml b/app/src/main/res/values/dimens.xml
index a988f0ca..08b31931 100644
--- a/app/src/main/res/values/dimens.xml
+++ b/app/src/main/res/values/dimens.xml
@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <dimen name="dialpad_button_size">72dp</dimen>
-    <dimen name="dialpad_button_padding">16dp</dimen>
+    <dimen name="dialpad_button_size">60dp</dimen>
     <dimen name="dialpad_button_size_small">50dp</dimen>
     <dimen name="incoming_call_arrow_size">50dp</dimen>
     <dimen name="incoming_call_button_size">72dp</dimen>