diff --git a/components/el512/steins.cpp b/components/el512/steins.cpp
index 7301cea..3b2a93f 100644
--- a/components/el512/steins.cpp
+++ b/components/el512/steins.cpp
@@ -98,7 +98,8 @@ constexpr int WORLD_LINE_COUNT = sizeof(WORLD_LINES) / sizeof(WORLD_LINES[0]);
 
 // One Nixie tube: glass outline, anode mesh, socket, and the lit digit.
 void tube(Display &it, const Fonts &f, int x, int y, char digit) {
-  constexpr int TW = 56, TH = 176, R = 28;
+  // Odd width so the dome (radius R, 2R + 1 pixels across) meets both walls.
+  constexpr int TW = 57, TH = 176, R = 28;
   const int cx = x + TW / 2;
   arc(it, cx, y + R, R, -90, 90);
   it.vertical_line(x, y + R, TH - R - 14);
@@ -111,9 +112,12 @@ void tube(Display &it, const Fonts &f, int x, int y, char digit) {
       it.draw_pixel_at(mx, my);
   if (digit != ' ') {
     const char s[2] = {digit, 0};
-    // Twice, one pixel apart, so the thin filament reads as glowing.
+    // Twice, one pixel apart, so the thin filament reads as glowing; kept
+    // inside the glass.
+    it.start_clipping(x + 2, y + 2, x + TW - 2, y + TH - 14);
     it.print(cx, y + TH / 2 - 8, f.nixie, TextAlign::CENTER, s);
     it.print(cx + 1, y + TH / 2 - 8, f.nixie, TextAlign::CENTER, s);
+    it.end_clipping();
   }
 }
 
diff --git a/docs/images/pages/sg_meter.png b/docs/images/pages/sg_meter.png
index 69b2232..afd94ae 100644
Binary files a/docs/images/pages/sg_meter.png and b/docs/images/pages/sg_meter.png differ
diff --git a/esphome/el512-panel.yaml b/esphome/el512-panel.yaml
index f1e3380..2bab2e8 100644
--- a/esphome/el512-panel.yaml
+++ b/esphome/el512-panel.yaml
@@ -207,7 +207,7 @@ font:
   # Steins;Gate pages (also use f_cp_mono, f_cp_code and f_ks_pixel)
   - file: "gfonts://Nixie One"
     id: f_sg_nixie
-    size: 110
+    size: 90
     glyphs: "0123456789."
   - file: "gfonts://Special Elite"
     id: f_sg_title