diff --git a/src/components/Header.jsx b/src/components/Header.jsx
index 3545dc4..9067f56 100644
--- a/src/components/Header.jsx
+++ b/src/components/Header.jsx
@@ -19,7 +19,7 @@ export const Header = ({
   isFullscreen
 }) => {
   return (
-    <div style={{ 
+    <div style={{
       gridColumn: '1 / -1',
       display: 'flex',
       flexWrap: 'nowrap',
@@ -35,8 +35,12 @@ export const Header = ({
     }}>
       {/* Callsign & Settings */}
       <div style={{ display: 'flex', alignItems: 'center', gap: '12px', flexShrink: 0 }}>
-        <span 
-          style={{ fontSize: '22px', fontWeight: '900', color: 'var(--accent-amber)', cursor: 'pointer', fontFamily: 'Orbitron, monospace', whiteSpace: 'nowrap' }}
+        <span
+          style={{
+            fontSize: config.callsignSize > 0.1 && config.callsignSize <= 2
+              ? `${22 * config.callsignSize}px`
+              : "22px", fontWeight: '900', color: 'var(--accent-amber)', cursor: 'pointer', fontFamily: 'Orbitron, monospace', whiteSpace: 'nowrap'
+          }}
           onClick={onSettingsClick}
           title="Click for settings"
         >
@@ -44,37 +48,37 @@ export const Header = ({
         </span>
         {config.version && <span style={{ fontSize: '11px', color: 'var(--text-muted)' }}>v{config.version}</span>}
       </div>
-      
+
       {/* UTC Clock */}
       <div style={{ display: 'flex', alignItems: 'center', gap: '6px', flexShrink: 0 }}>
         <span style={{ fontSize: '13px', color: 'var(--accent-cyan)', fontWeight: '600' }}>UTC</span>
-        <span style={{ 
-          fontSize: '24px', 
-          fontWeight: '700', 
-          color: 'var(--accent-cyan)', 
+        <span style={{
+          fontSize: '24px',
+          fontWeight: '700',
+          color: 'var(--accent-cyan)',
           fontFamily: 'JetBrains Mono, Consolas, monospace',
           whiteSpace: 'nowrap'
         }}>{utcTime}</span>
         <span style={{ fontSize: '12px', color: 'var(--text-muted)', whiteSpace: 'nowrap' }}>{utcDate}</span>
       </div>
-      
+
       {/* Local Clock - Clickable to toggle 12/24 hour format */}
-      <div 
+      <div
         style={{ display: 'flex', alignItems: 'center', gap: '6px', cursor: 'pointer', flexShrink: 0 }}
         onClick={onTimeFormatToggle}
         title={`Click to switch to ${use12Hour ? '24-hour' : '12-hour'} format`}
       >
         <span style={{ fontSize: '13px', color: 'var(--accent-amber)', fontWeight: '600' }}>LOCAL</span>
-        <span style={{ 
-          fontSize: '24px', 
-          fontWeight: '700', 
-          color: 'var(--accent-amber)', 
+        <span style={{
+          fontSize: '24px',
+          fontWeight: '700',
+          color: 'var(--accent-amber)',
           fontFamily: 'JetBrains Mono, Consolas, monospace',
           whiteSpace: 'nowrap'
         }}>{localTime}</span>
         <span style={{ fontSize: '12px', color: 'var(--text-muted)', whiteSpace: 'nowrap' }}>{localDate}</span>
       </div>
-      
+
       {/* Weather & Solar Stats */}
       <div style={{ display: 'flex', gap: '12px', fontSize: '13px', fontFamily: 'JetBrains Mono, Consolas, monospace', whiteSpace: 'nowrap', flexShrink: 0 }}>
         {localWeather?.data && (() => {
@@ -85,12 +89,12 @@ export const Header = ({
           const tempC = Math.round(rawC);
           const windLabel = localWeather.data.windUnit || 'mph';
           return (
-          <div title={`${localWeather.data.description} • Wind: ${localWeather.data.windSpeed} ${windLabel}`}>
-            <span style={{ marginRight: '3px' }}>{localWeather.data.icon}</span>
-            <span style={{ color: 'var(--accent-cyan)', fontWeight: '600' }}>
-              {tempF}°F/{tempC}°C
-            </span>
-          </div>
+            <div title={`${localWeather.data.description} • Wind: ${localWeather.data.windSpeed} ${windLabel}`}>
+              <span style={{ marginRight: '3px' }}>{localWeather.data.icon}</span>
+              <span style={{ color: 'var(--accent-cyan)', fontWeight: '600' }}>
+                {tempF}°F/{tempC}°C
+              </span>
+            </div>
           );
         })()}
         <div>
@@ -108,7 +112,7 @@ export const Header = ({
           <span style={{ color: 'var(--accent-cyan)', fontWeight: '700' }}>{spaceWeather?.data?.sunspotNumber || '--'}</span>
         </div>
       </div>
-      
+
       {/* Settings & Fullscreen Buttons */}
       <div style={{ display: 'flex', gap: '6px', flexShrink: 0 }}>
         <a
@@ -116,17 +120,17 @@ export const Header = ({
           target="_blank"
           rel="noopener noreferrer"
           style={{
-            background: 'linear-gradient(135deg, #ff813f 0%, #ffdd00 100%)', 
+            background: 'linear-gradient(135deg, #ff813f 0%, #ffdd00 100%)',
             border: 'none',
-            padding: '6px 10px', 
-            borderRadius: '4px', 
+            padding: '6px 10px',
+            borderRadius: '4px',
             color: '#000',
-            fontSize: '12px', 
+            fontSize: '12px',
             cursor: 'pointer',
-            fontWeight: '600', 
+            fontWeight: '600',
             textDecoration: 'none',
-            display: 'flex', 
-            alignItems: 'center', 
+            display: 'flex',
+            alignItems: 'center',
             gap: '3px',
             whiteSpace: 'nowrap'
           }}
@@ -136,13 +140,13 @@ export const Header = ({
         </a>
         <button
           onClick={onSettingsClick}
-          style={{ 
-            background: 'var(--bg-tertiary)', 
-            border: '1px solid var(--border-color)', 
-            padding: '6px 10px', 
-            borderRadius: '4px', 
-            color: 'var(--text-secondary)', 
-            fontSize: '12px', 
+          style={{
+            background: 'var(--bg-tertiary)',
+            border: '1px solid var(--border-color)',
+            padding: '6px 10px',
+            borderRadius: '4px',
+            color: 'var(--text-secondary)',
+            fontSize: '12px',
             cursor: 'pointer',
             whiteSpace: 'nowrap'
           }}
@@ -151,19 +155,19 @@ export const Header = ({
         </button>
         <button
           onClick={onFullscreenToggle}
-          style={{ 
-            background: isFullscreen ? 'rgba(0, 255, 136, 0.15)' : 'var(--bg-tertiary)', 
-            border: `1px solid ${isFullscreen ? 'var(--accent-green)' : 'var(--border-color)'}`, 
-            padding: '6px 10px', 
-            borderRadius: '4px', 
-            color: isFullscreen ? 'var(--accent-green)' : 'var(--text-secondary)', 
-            fontSize: '12px', 
+          style={{
+            background: isFullscreen ? 'rgba(0, 255, 136, 0.15)' : 'var(--bg-tertiary)',
+            border: `1px solid ${isFullscreen ? 'var(--accent-green)' : 'var(--border-color)'}`,
+            padding: '6px 10px',
+            borderRadius: '4px',
+            color: isFullscreen ? 'var(--accent-green)' : 'var(--text-secondary)',
+            fontSize: '12px',
             cursor: 'pointer',
             whiteSpace: 'nowrap'
           }}
           title={isFullscreen ? "Exit Fullscreen (Esc)" : "Enter Fullscreen"}
         >
-          {isFullscreen 
+          {isFullscreen
             ? <><IconShrink size={12} style={{ verticalAlign: 'middle', marginRight: '4px' }} />Exit</>
             : <><IconExpand size={12} style={{ verticalAlign: 'middle', marginRight: '4px' }} />Full</>
           }
diff --git a/src/components/SettingsPanel.jsx b/src/components/SettingsPanel.jsx
index 58f7109..de58466 100644
--- a/src/components/SettingsPanel.jsx
+++ b/src/components/SettingsPanel.jsx
@@ -9,6 +9,7 @@ import { LANGUAGES } from '../lang/i18n.js';
 
 export const SettingsPanel = ({ isOpen, onClose, config, onSave }) => {
   const [callsign, setCallsign] = useState(config?.callsign || '');
+  const [callsignSize, setCallsignSize] = useState(config?.callsignSize || 1.0);
   const [gridSquare, setGridSquare] = useState('');
   const [lat, setLat] = useState(config?.location?.lat || 0);
   const [lon, setLon] = useState(config?.location?.lon || 0);
@@ -17,7 +18,7 @@ export const SettingsPanel = ({ isOpen, onClose, config, onSave }) => {
   const [timezone, setTimezone] = useState(config?.timezone || '');
   const [dxClusterSource, setDxClusterSource] = useState(config?.dxClusterSource || 'dxspider-proxy');
   const { t, i18n } = useTranslation();
-  
+
   // Layer controls
   const [layers, setLayers] = useState([]);
   const [activeTab, setActiveTab] = useState('station');
@@ -25,6 +26,7 @@ export const SettingsPanel = ({ isOpen, onClose, config, onSave }) => {
   useEffect(() => {
     if (config) {
       setCallsign(config.callsign || '');
+      setCallsignSize(config.callsignSize || 1.0)
       setLat(config.location?.lat || 0);
       setLon(config.location?.lon || 0);
       setTheme(config.theme || 'dark');
@@ -70,22 +72,22 @@ export const SettingsPanel = ({ isOpen, onClose, config, onSave }) => {
   const parseGridSquare = (grid) => {
     grid = grid.toUpperCase();
     if (grid.length < 4) return null;
-    
+
     const lon1 = (grid.charCodeAt(0) - 65) * 20 - 180;
     const lat1 = (grid.charCodeAt(1) - 65) * 10 - 90;
     const lon2 = parseInt(grid[2]) * 2;
     const lat2 = parseInt(grid[3]) * 1;
-    
+
     let lon = lon1 + lon2 + 1;
     let lat = lat1 + lat2 + 0.5;
-    
+
     if (grid.length >= 6) {
       const lon3 = (grid.charCodeAt(4) - 65) * (2/24);
       const lat3 = (grid.charCodeAt(5) - 65) * (1/24);
       lon = lon1 + lon2 + lon3 + (1/24);
       lat = lat1 + lat2 + lat3 + (1/48);
     }
-    
+
     return { lat, lon };
   };
 
@@ -116,17 +118,17 @@ export const SettingsPanel = ({ isOpen, onClose, config, onSave }) => {
     if (window.hamclockLayerControls) {
       const layer = layers.find(l => l.id === layerId);
       const newEnabledState = !layer.enabled;
-      
+
       // Update the control
       window.hamclockLayerControls.toggleLayer(layerId, newEnabledState);
-      
+
       // Force immediate UI update
-      setLayers(prevLayers => 
-        prevLayers.map(l => 
+      setLayers(prevLayers =>
+        prevLayers.map(l =>
           l.id === layerId ? { ...l, enabled: newEnabledState } : l
         )
       );
-      
+
       // Refresh after a short delay to get the updated state
       setTimeout(() => {
         if (window.hamclockLayerControls) {
@@ -147,6 +149,7 @@ export const SettingsPanel = ({ isOpen, onClose, config, onSave }) => {
     onSave({
       ...config,
       callsign: callsign.toUpperCase(),
+      callsignSize: callsignSize,
       location: { lat: parseFloat(lat), lon: parseFloat(lon) },
       theme,
       layout,
@@ -198,8 +201,8 @@ export const SettingsPanel = ({ isOpen, onClose, config, onSave }) => {
         maxHeight: '90vh',
         overflowY: 'auto'
       }}>
-        <h2 style={{ 
-          color: 'var(--accent-cyan)', 
+        <h2 style={{
+          color: 'var(--accent-cyan)',
           marginTop: 0,
           marginBottom: '24px',
           textAlign: 'center',
@@ -302,6 +305,35 @@ export const SettingsPanel = ({ isOpen, onClose, config, onSave }) => {
               />
             </div>
 
+            {/* Callsign Size*/}
+            <div style={{ marginBottom: '20px'}}>
+              <div>
+                <label style={{ display: 'block', marginBottom: '6px', color: 'var(--text-muted)', fontSize: '11px', textTransform: 'uppercase' }}>
+                  {t('station.settings.callsignSize')}
+                </label>
+                <input
+                  type="number"
+                  step="0.1"
+                  value={isNaN(lat) ? '' : callsignSize}
+                  onChange={(e) => {
+                    if (e.target.value >= 0.1 && e.target.value <= 2.0) {
+                      setCallsignSize(e.target.value)
+                    }}}
+                  style={{
+                    width: '100%',
+                    padding: '10px',
+                    background: 'var(--bg-tertiary)',
+                    border: '1px solid var(--border-color)',
+                    borderRadius: '6px',
+                    color: 'var(--text-primary)',
+                    fontSize: '14px',
+                    fontFamily: 'JetBrains Mono, monospace',
+                    boxSizing: 'border-box'
+                  }}
+                />
+              </div>
+            </div>
+            
             {/* Grid Square */}
             <div style={{ marginBottom: '20px' }}>
               <label style={{ display: 'block', marginBottom: '6px', color: 'var(--text-muted)', fontSize: '11px', textTransform: 'uppercase', letterSpacing: '1px' }}>
@@ -601,15 +633,15 @@ export const SettingsPanel = ({ isOpen, onClose, config, onSave }) => {
                     onClick={() => i18n.changeLanguage(lang.code)}
                     style={{
                       padding: '8px 6px',
-                      background: i18n.language === lang.code || (i18n.language && i18n.language.startsWith(lang.code)) 
-                        ? 'rgba(0, 221, 255, 0.2)' 
+                      background: i18n.language === lang.code || (i18n.language && i18n.language.startsWith(lang.code))
+                        ? 'rgba(0, 221, 255, 0.2)'
                         : 'var(--bg-tertiary)',
                       border: `1px solid ${i18n.language === lang.code || (i18n.language && i18n.language.startsWith(lang.code))
-                        ? 'var(--accent-cyan)' 
+                        ? 'var(--accent-cyan)'
                         : 'var(--border-color)'}`,
                       borderRadius: '6px',
                       color: i18n.language === lang.code || (i18n.language && i18n.language.startsWith(lang.code))
-                        ? 'var(--accent-cyan)' 
+                        ? 'var(--accent-cyan)'
                         : 'var(--text-secondary)',
                       fontSize: '12px',
                       cursor: 'pointer',
diff --git a/src/lang/en.json b/src/lang/en.json
index f6399e6..c1b753c 100644
--- a/src/lang/en.json
+++ b/src/lang/en.json
@@ -14,6 +14,7 @@
   "station.settings.button.save": "Save Settings",
   "station.settings.button.save.confirm": "Settings saved to your browser",
   "station.settings.callsign": "Your Callsign",
+  "station.settings.callsignSize": "Your Callsign's size",
   "station.settings.describe": "Enter your callsign and grid square to get started. Settings are saved in your browser.",
   "station.settings.dx.describe": "→ Real-time DX Spider feed via our dedicated proxy service",
   "station.settings.dx.option1": "⭐ DX Spider Proxy (Recommended)",
diff --git a/src/lang/es.json b/src/lang/es.json
index 3099557..4454640 100644
--- a/src/lang/es.json
+++ b/src/lang/es.json
@@ -14,6 +14,7 @@
   "station.settings.button.save": "Guardar Configuración",
   "station.settings.button.save.confirm": "La configuración se guarda en tu navegador",
   "station.settings.callsign": "Tu Indicativo",
+  "station.settings.callsignSize": "El tamaño de tu Indicativo",
   "station.settings.describe": "Ingresa tu indicativo y cuadrícula para comenzar. Tu configuración se guardará en el navegador.",
   "station.settings.dx.describe": "→ Feed en tiempo real de DX Spider a través de nuestro servicio proxy dedicado",
   "station.settings.dx.option1": "⭐ Proxy DX Spider (Recomendado)",
diff --git a/src/utils/config.js b/src/utils/config.js
index a3f965d..469ecd9 100644
--- a/src/utils/config.js
+++ b/src/utils/config.js
@@ -10,6 +10,7 @@
 
 export const DEFAULT_CONFIG = {
   callsign: 'N0CALL',
+  callsignSize: 1.0, // Float multiplies base px size (0.1 to 2.0)
   locator: '',
   location: { lat: 40.0150, lon: -105.2705 }, // Boulder, CO (default)
   defaultDX: { lat: 35.6762, lon: 139.6503 }, // Tokyo