diff --git a/src/main.rs b/src/main.rs
index c6b8572..92121b7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -129,8 +129,8 @@ fn gen_svg() -> Document {
         .time()
         .num_seconds_from_midnight() as i32;
 
-    let local_hour_font_size = 16.5;
-    let hour_name_font_size = 13.37699;
+    let local_hour_font_size = image_width as f32 * 0.02357;
+    let hour_name_font_size = image_width as f32 * 0.019109;
     let utc_hour_font_size = image_width as f32 * 0.021462;
     let outer_r = (image_width as f32) / 2.0 - 3.0 * hour_name_font_size;
     let ring_width = hour_name_font_size * 3.0;