diff --git a/Sources/UI/Terminal/FontStore.swift b/Sources/UI/Terminal/FontStore.swift
index 172e555..3d21ffd 100644
--- a/Sources/UI/Terminal/FontStore.swift
+++ b/Sources/UI/Terminal/FontStore.swift
@@ -8,7 +8,7 @@ import Combine
 
 private let kFontIdKey   = "terminal.font"
 private let kFontSizeKey = "terminal.fontSize"
-private let kDefaultSize: CGFloat = 13
+private let kDefaultSize: CGFloat = 11
 
 @MainActor
 public final class FontStore: ObservableObject {
@@ -30,8 +30,11 @@ public final class FontStore: ObservableObject {
 
     private init() {
         // Restore point size (clamped to a sane range).
+        // If stored value is the old default (13pt), migrate to new default (11pt).
         let storedSize = UserDefaults.standard.object(forKey: kFontSizeKey) as? CGFloat
-        size = storedSize.map { max(8, min(32, $0)) } ?? kDefaultSize
+        if storedSize == 13 { UserDefaults.standard.removeObject(forKey: kFontSizeKey) }
+        let effectiveStored = storedSize == 13 ? nil : storedSize
+        size = effectiveStored.map { max(8, min(32, $0)) } ?? kDefaultSize
 
         // Restore selected font id.
         let all: [TerminalFont] = [.sfMono, .menlo, .jetBrainsMono]