diff --git a/core/embed/rust/src/ui/model_mercury/component/homescreen.rs b/core/embed/rust/src/ui/model_mercury/component/homescreen.rs
index 06a3cbb4c..e09e0b71c 100644
--- a/core/embed/rust/src/ui/model_mercury/component/homescreen.rs
+++ b/core/embed/rust/src/ui/model_mercury/component/homescreen.rs
@@ -354,8 +354,8 @@ impl Component for Lockscreen {
     }
 
     fn render<'s>(&'s self, target: &mut impl Renderer<'s>) {
-        const OVERLAY_SIZE: i16 = 170;
-        const OVERLAY_BORDER: i16 = (AREA.height() - OVERLAY_SIZE) / 2;
+        const OVERLAY_RADIUS: i16 = 85;
+        const OVERLAY_BORDER: i16 = (AREA.height() / 2) - OVERLAY_RADIUS;
         const OVERLAY_OFFSET: i16 = 9;
 
         let center = AREA.center();
@@ -369,7 +369,7 @@ impl Component for Lockscreen {
             .with_bg(Color::black())
             .render(target);
 
-        shape::Bar::new(AREA.split_bottom(OVERLAY_BORDER - OVERLAY_OFFSET).1)
+        shape::Bar::new(AREA.split_bottom(OVERLAY_BORDER - OVERLAY_OFFSET - 2).1)
             .with_bg(Color::black())
             .render(target);
 
@@ -377,7 +377,7 @@ impl Component for Lockscreen {
             .with_bg(Color::black())
             .render(target);
 
-        shape::Bar::new(AREA.split_right(OVERLAY_BORDER).1)
+        shape::Bar::new(AREA.split_right(OVERLAY_BORDER - 2).1)
             .with_bg(Color::black())
             .render(target);
 
diff --git a/core/embed/rust/src/ui/model_mercury/cshape/unlock_overlay.rs b/core/embed/rust/src/ui/model_mercury/cshape/unlock_overlay.rs
index 36dbfde06..f6285a77e 100644
--- a/core/embed/rust/src/ui/model_mercury/cshape/unlock_overlay.rs
+++ b/core/embed/rust/src/ui/model_mercury/cshape/unlock_overlay.rs
@@ -69,7 +69,7 @@ impl UnlockOverlay {
         canvas.fill_sector(center, r, 180.0 + angle, 280.0 + angle, transp);
         canvas.fill_circle(center, r - Self::THICKNESS, opaque, 255);
 
-        // Innner fixed circle
+        // Inner fixed circle
         let r = Self::RADIUS - (9 * Self::SPAN) / 2;
         canvas.fill_circle(center, r, transp, 255);
         canvas.fill_circle(center, r - Self::THICKNESS, opaque, 255);
@@ -78,9 +78,10 @@ impl UnlockOverlay {
 
 impl<'a> Shape<'a> for UnlockOverlay {
     fn bounds(&self) -> Rect {
+        // +1 pixel because middle pixel is not counted in circle radius
         Rect::new(
-            self.pos - Offset::uniform(Self::RADIUS),
-            self.pos + Offset::uniform(Self::RADIUS + 1),
+            self.pos - Offset::uniform(Self::RADIUS + 1),
+            self.pos + Offset::uniform(Self::RADIUS + 2),
         )
     }