diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index 2a4eed68..ef93cd5c 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -963,7 +963,7 @@
     <string name="indent_small_adjustment">2段目の余白の微調整</string>
     <string name="side_margin_edge_keys">3段目の両端の余白</string>
     <string name="qwerty_key_letter_size">キーの文字サイズ</string>
-    <string name="qwerty_symbol_keymap_text_size">記号キーマップの文字サイズ</string>
+    <string name="qwerty_symbol_keymap_text_size">記号キーマップ・数字フリック文字のサイズ</string>
     <string name="qwerty_special_key_text_size">特殊キーの文字サイズ</string>
     <string name="qwerty_special_key_icon_size">特殊キーのアイコンサイズ</string>
     <string name="reset_to_default">初期値に戻す</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index f305c1d2..79c824d8 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1086,7 +1086,7 @@
     <string name="indent_small_adjustment">Indent Small (Adjustment)</string>
     <string name="side_margin_edge_keys">Side Margin (Edge keys)</string>
     <string name="qwerty_key_letter_size">Key Letter Size</string>
-    <string name="qwerty_symbol_keymap_text_size">Symbol Keymap Text Size</string>
+    <string name="qwerty_symbol_keymap_text_size">Symbol Map / Number Flick Text Size</string>
     <string name="qwerty_special_key_text_size">Special Key Text Size</string>
     <string name="qwerty_special_key_icon_size">Special Key Icon Size</string>
     <string name="reset_to_default">Reset to Default</string>
diff --git a/qwerty_keyboard/src/androidTest/java/com/kazumaproject/qwerty_keyboard/ui/QwertyGuideTextSizeInstrumentedTest.kt b/qwerty_keyboard/src/androidTest/java/com/kazumaproject/qwerty_keyboard/ui/QwertyGuideTextSizeInstrumentedTest.kt
new file mode 100644
index 00000000..09893733
--- /dev/null
+++ b/qwerty_keyboard/src/androidTest/java/com/kazumaproject/qwerty_keyboard/ui/QwertyGuideTextSizeInstrumentedTest.kt
@@ -0,0 +1,60 @@
+package com.kazumaproject.qwerty_keyboard.ui
+
+import android.content.Context
+import android.view.ContextThemeWrapper
+import android.view.View
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import com.kazumaproject.qwerty_keyboard.R
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class QwertyGuideTextSizeInstrumentedTest {
+
+    @Test
+    fun guideTextSizeAppliesToLetterAndNumberKeyGuides() {
+        runOnMain {
+            val keyboard = createKeyboard()
+
+            keyboard.setKeyMargins(symbolKeymapTextSizeSp = 15f)
+
+            assertEquals(15f, keyboard.findViewById<QWERTYButton>(R.id.key_a).guideTextSizeSp)
+            assertEquals(15f, keyboard.findViewById<QWERTYButton>(R.id.key_1).guideTextSizeSp)
+            assertEquals(15f, keyboard.findViewById<QWERTYButton>(R.id.key_0).guideTextSizeSp)
+        }
+    }
+
+    @Test
+    fun guideTextSizeUsesQwertyButtonBounds() {
+        runOnMain {
+            val keyboard = createKeyboard()
+            val numberKey = keyboard.findViewById<QWERTYButton>(R.id.key_1)
+
+            keyboard.setKeyMargins(symbolKeymapTextSizeSp = 100f)
+            assertEquals(24f, numberKey.guideTextSizeSp)
+
+            keyboard.setKeyMargins(symbolKeymapTextSizeSp = 1f)
+            assertEquals(4f, numberKey.guideTextSizeSp)
+        }
+    }
+
+    private fun createKeyboard(): QWERTYKeyboardView {
+        val targetContext = InstrumentationRegistry.getInstrumentation().targetContext
+        val themedContext: Context = ContextThemeWrapper(
+            targetContext,
+            com.google.android.material.R.style.Theme_Material3_DayNight_NoActionBar
+        )
+        return QWERTYKeyboardView(themedContext).apply {
+            val widthSpec = View.MeasureSpec.makeMeasureSpec(1080, View.MeasureSpec.EXACTLY)
+            val heightSpec = View.MeasureSpec.makeMeasureSpec(500, View.MeasureSpec.EXACTLY)
+            measure(widthSpec, heightSpec)
+            layout(0, 0, 1080, 500)
+        }
+    }
+
+    private fun runOnMain(block: () -> Unit) {
+        InstrumentationRegistry.getInstrumentation().runOnMainSync(block)
+    }
+}
diff --git a/qwerty_keyboard/src/main/java/com/kazumaproject/qwerty_keyboard/ui/QWERTYKeyboardView.kt b/qwerty_keyboard/src/main/java/com/kazumaproject/qwerty_keyboard/ui/QWERTYKeyboardView.kt
index 65ed86f3..e4225bbc 100644
--- a/qwerty_keyboard/src/main/java/com/kazumaproject/qwerty_keyboard/ui/QWERTYKeyboardView.kt
+++ b/qwerty_keyboard/src/main/java/com/kazumaproject/qwerty_keyboard/ui/QWERTYKeyboardView.kt
@@ -777,7 +777,7 @@ class QWERTYKeyboardView @JvmOverloads constructor(
         applyLayoutForMode(qwertyMode.value)
 
         updateAllKeyTextSizes()
-        updateSymbolKeymapTextSizes()
+        updateGuideTextSizes()
         updateSpecialKeyTextSizes()
         refreshSpecialKeyIconSizesWhenLaidOut()
     }
@@ -805,8 +805,9 @@ class QWERTYKeyboardView @JvmOverloads constructor(
         }
     }
 
-    private fun updateSymbolKeymapTextSizes() {
-        defaultQWERTYButtonsRoman.distinct().forEach { view ->
+    private fun updateGuideTextSizes() {
+        val guideButtons = defaultQWERTYButtonsRoman.asList() + numberRowButtons.asList()
+        guideButtons.distinct().forEach { view ->
             view.guideTextSizeSp = symbolKeymapTextSizeSp
         }
     }
@@ -1314,6 +1315,13 @@ class QWERTYKeyboardView @JvmOverloads constructor(
         )
     }
 
+    private val numberRowButtons: Array<QWERTYButton> by lazy {
+        arrayOf(
+            binding.key1, binding.key2, binding.key3, binding.key4, binding.key5,
+            binding.key6, binding.key7, binding.key8, binding.key9, binding.key0
+        )
+    }
+
     private fun attachDefaultKeyLabels() {
         val chars =
             if (romajiModeState.value) QWERTYKeys.DEFAULT_KEYS_JP else QWERTYKeys.DEFAULT_KEYS