diff --git a/scenes/game_elements/props/sign/components/sign.gd b/scenes/game_elements/props/sign/components/sign.gd
index 541fc6883..4ae15e38d 100644
--- a/scenes/game_elements/props/sign/components/sign.gd
+++ b/scenes/game_elements/props/sign/components/sign.gd
@@ -8,6 +8,11 @@ enum Frame {
 	LEFT_AND_RIGHT = 1,
 }
 
+## Font for the label when [member Settings.large_text] is on. It's
+## Jersey 15 instead of Jersey 10, at the size where it's crisp.
+const LARGE_TEXT_FONT := preload("uid://db8kp7xkv7gyn")
+const LARGE_TEXT_FONT_SIZE := 27
+
 @export var direction: Enums.LookAtSide = Enums.LookAtSide.LEFT:
 	set(a_direction):
 		direction = a_direction
@@ -28,6 +33,10 @@ func _ready() -> void:
 	if Engine.is_editor_hint():
 		return
 
+	if Settings.large_text:
+		%Label.add_theme_font_override(&"font", LARGE_TEXT_FONT)
+		%Label.add_theme_font_size_override(&"font_size", LARGE_TEXT_FONT_SIZE)
+
 	update_label_visiblity()
 
 
diff --git a/scenes/globals/settings/settings.gd b/scenes/globals/settings/settings.gd
index ffdccd722..2524069ee 100644
--- a/scenes/globals/settings/settings.gd
+++ b/scenes/globals/settings/settings.gd
@@ -12,6 +12,7 @@ const VOLUME_SECTION := "Volume"
 
 const DISPLAY_SECTION := "Display"
 const SHOW_HUD_KEY := "Show HUD"
+const LARGE_TEXT_KEY := "Large Text"
 
 const LANGUAGE_SECTION := "Language"
 const LOCALE_KEY := "Locale"
@@ -23,6 +24,10 @@ const MINIMUM_ASPECT_RATIO := 1.25
 ## An arbitrary wide ratio, lower than 21:9 ("ultrawide").
 const MAXIMUM_ASPECT_RATIO := 2.2
 
+## Screens whose shortest side is under this are considered small, like phones.
+## This is the threshold that Android uses to tell phones from tablets.
+const SMALL_SCREEN_SHORTEST_SIDE_DP := 600.0
+
 @export var fullscreen: bool:
 	get = is_fullscreen,
 	set = set_fullscreen
@@ -34,6 +39,15 @@ const MAXIMUM_ASPECT_RATIO := 2.2
 		_settings.set_value(DISPLAY_SECTION, SHOW_HUD_KEY, new_value)
 		_save()
 
+## Show the text of dialogues and signs with a bigger font. Unless the player
+## changes it, this is on for small screens like phones, and off otherwise.
+@export var large_text: bool:
+	get:
+		return _settings.get_value(DISPLAY_SECTION, LARGE_TEXT_KEY, is_small_screen())
+	set(new_value):
+		_settings.set_value(DISPLAY_SECTION, LARGE_TEXT_KEY, new_value)
+		_save()
+
 var _settings := ConfigFile.new()
 
 var _overrides_path: String
@@ -124,6 +138,25 @@ func set_fullscreen(toggled_on: bool) -> void:
 		set_window_mode(DisplayServer.WINDOW_MODE_WINDOWED)
 
 
+## Return true on touchscreen devices with a small screen, like phones, and
+## false on tablets and desktops.
+func is_small_screen() -> bool:
+	if not DisplayServer.is_touchscreen_available():
+		return false
+	var screen_size := Vector2(DisplayServer.screen_get_size())
+	var shortest_side := minf(screen_size.x, screen_size.y)
+	var shortest_side_dp: float
+	if OS.has_feature("web"):
+		# On the web, the screen size divided by the scale is in CSS pixels,
+		# which are close to density-independent pixels. The DPI can't be used,
+		# because browsers derive it from the scale instead of the real screen.
+		shortest_side_dp = shortest_side / DisplayServer.screen_get_scale()
+	else:
+		# Density-independent pixels are 1/160 inch.
+		shortest_side_dp = shortest_side * 160.0 / DisplayServer.screen_get_dpi()
+	return shortest_side_dp < SMALL_SCREEN_SHORTEST_SIDE_DP
+
+
 func get_locale() -> String:
 	return TranslationServer.get_locale()
 
diff --git a/scenes/menus/options/components/video_settings.tscn b/scenes/menus/options/components/video_settings.tscn
index 3cd33d176..36b93548a 100644
--- a/scenes/menus/options/components/video_settings.tscn
+++ b/scenes/menus/options/components/video_settings.tscn
@@ -51,6 +51,13 @@ text = "Fullscreen"
 script = ExtResource("2_qb52c")
 setting = &"fullscreen"
 
+[node name="LargeTextButton" type="CheckButton" parent="VBoxContainer/GridContainer" unique_id=1394617293]
+layout_mode = 2
+size_flags_horizontal = 3
+text = "Large Text"
+script = ExtResource("2_qb52c")
+setting = &"large_text"
+
 [node name="BackButton" type="Button" parent="VBoxContainer" unique_id=1300000002]
 unique_name_in_owner = true
 layout_mode = 2
diff --git a/scenes/ui_elements/dialogue/components/balloon.gd b/scenes/ui_elements/dialogue/components/balloon.gd
index 7ccc10719..a37f101b9 100644
--- a/scenes/ui_elements/dialogue/components/balloon.gd
+++ b/scenes/ui_elements/dialogue/components/balloon.gd
@@ -7,6 +7,10 @@ extends CanvasLayer
 const PLAYER_RIBBON_TYPE_VARIATION := &"PlayerRibbon"
 const NPC_RIBBON_TYPE_VARIATION := &"NPCRibbon"
 
+## Theme with a bigger font, used when [member Settings.large_text] is
+## on. It uses Jersey 20 instead of Jersey 15, so it's still crisp.
+const LARGE_TEXT_THEME := preload("uid://nymvlhys46nm")
+
 ## The dialogue resource
 @export var dialogue_resource: DialogueResource
 
@@ -101,6 +105,8 @@ var _player_name: String = Player.DEFAULT_PLAYER_NAME
 func _ready() -> void:
 	if Engine.is_editor_hint():
 		return
+	if Settings.large_text:
+		balloon.theme = LARGE_TEXT_THEME
 	balloon.hide()
 	Engine.get_singleton("DialogueManager").mutated.connect(_on_mutated)
 
diff --git a/scenes/ui_elements/dialogue/components/large_text_theme.tres b/scenes/ui_elements/dialogue/components/large_text_theme.tres
new file mode 100644
index 000000000..4d9c723c2
--- /dev/null
+++ b/scenes/ui_elements/dialogue/components/large_text_theme.tres
@@ -0,0 +1,7 @@
+[gd_resource type="Theme" format=3 uid="uid://nymvlhys46nm"]
+
+[ext_resource type="FontFile" uid="uid://c3bb7lmvdqc5e" path="res://assets/third_party/fonts/jersey/Jersey20-Regular.ttf" id="1_7a9qj"]
+
+[resource]
+default_font = ExtResource("1_7a9qj")
+default_font_size = 34