diff --git a/cromulant/ants.py b/cromulant/ants.py
index b44dc8e..d7a4a46 100644
--- a/cromulant/ants.py
+++ b/cromulant/ants.py
@@ -70,16 +70,11 @@ class Ants:
     @staticmethod
     def prepare() -> None:
         Ants.get()
-        Ants.fill()
 
     @staticmethod
     def hatch(num: int = 1) -> None:
         from .game import Game
 
-        if len(Ants.ants) >= Config.max_ants:
-            Window.alert("Max ants reached\nTerminate some to hatch new ones")
-            return
-
         now = Utils.now()
 
         for _ in range(num):
@@ -91,9 +86,6 @@ class Ants:
             Ants.ants.append(ant)
             Ants.announce_hatch(ant)
 
-            if len(Ants.ants) >= Config.max_ants:
-                break
-
         Ants.save()
         Game.update_info()
 
@@ -179,28 +171,16 @@ class Ants:
     @staticmethod
     def get() -> None:
         objs = Storage.get_ants()
-        changed = False
-
-        if len(objs) > Config.max_ants:
-            objs = objs[: Config.max_ants]
-            changed = True
 
         for obj in objs:
             ant = Ant()
             ant.from_dict(obj)
             Ants.ants.append(ant)
 
-        if changed:
-            Ants.save()
-
     @staticmethod
-    def fill() -> None:
-        diff = Config.max_ants - len(Ants.ants)
-
-        if diff <= 0:
-            return
-
-        Ants.hatch(diff)
+    def populate(num: int) -> None:
+        Ants.clear()
+        Ants.hatch(num)
 
     @staticmethod
     def random_name() -> str:
diff --git a/cromulant/config.py b/cromulant/config.py
index 2d90a44..bb7d00f 100644
--- a/cromulant/config.py
+++ b/cromulant/config.py
@@ -10,7 +10,6 @@ class Config:
     program: str = "cromulant"
     width: int = 820
     height: int = 900
-    max_ants: int = 100
     here: Path
     ants_json: Path
     icon_path: Path
diff --git a/cromulant/game.py b/cromulant/game.py
index 0d0d05f..e4a66c5 100644
--- a/cromulant/game.py
+++ b/cromulant/game.py
@@ -273,10 +273,19 @@ class Game:
 
     @staticmethod
     def restart() -> None:
-        def action() -> None:
-            Ants.clear()
-            Window.clear_view()
-            Ants.fill()
-            Game.start_loop()
+        opts = ["25", "50", "100", "200", "300", "400", "500"]
+        opts = [f"{opt} ants" for opt in opts]
+        size = Window.prompt_combobox("Size of the population", opts, 2)
 
-        Window.confirm("Restart the ants?", action)
+        if not size:
+            return
+
+        num = int(size.split(" ")[0])
+
+        Window.clear_view()
+        Ants.populate(num)
+        Game.start_loop()
+
+    @staticmethod
+    def update_size() -> None:
+        pass
diff --git a/cromulant/window.py b/cromulant/window.py
index 832c0b5..259476a 100644
--- a/cromulant/window.py
+++ b/cromulant/window.py
@@ -5,10 +5,12 @@ from collections.abc import Callable
 import signal
 
 from PySide6.QtWidgets import QApplication  # type: ignore
+from PySide6.QtWidgets import QDialog
 from PySide6.QtWidgets import QMainWindow
 from PySide6.QtWidgets import QWidget
 from PySide6.QtWidgets import QGraphicsScene
 from PySide6.QtWidgets import QVBoxLayout
+from PySide6.QtWidgets import QLabel
 from PySide6.QtWidgets import QPushButton
 from PySide6.QtWidgets import QHBoxLayout
 from PySide6.QtWidgets import QScrollArea
@@ -37,6 +39,39 @@ class FilterLineEdit(QLineEdit):  # type: ignore
             super().keyPressEvent(e)
 
 
+class ComboBoxDialog(QDialog):  # type: ignore
+    def __init__(self, message: str, options: list[str], defindex: int) -> None:
+        super().__init__()
+        self.setWindowTitle("Select Option")
+        self.setFixedSize(300, 150)  # Set a fixed size for the dialog
+
+        self.layout = QVBoxLayout()
+
+        self.label = QLabel(message)
+        self.layout.addWidget(self.label)
+
+        self.combo_box = QComboBox()
+        self.combo_box.addItems(options)
+        self.combo_box.setCurrentIndex(defindex)
+        self.layout.addWidget(self.combo_box)
+
+        self.button_layout = QHBoxLayout()
+
+        self.ok_button = QPushButton("OK")
+        self.ok_button.clicked.connect(self.accept)
+        self.button_layout.addWidget(self.ok_button)
+
+        self.cancel_button = QPushButton("Cancel")
+        self.cancel_button.clicked.connect(self.reject)
+        self.button_layout.addWidget(self.cancel_button)
+
+        self.layout.addLayout(self.button_layout)
+        self.setLayout(self.layout)
+
+    def get_selection(self) -> str:
+        return str(self.combo_box.currentText())
+
+
 class Window:
     app: QApplication
     window: QMainWindow
@@ -107,23 +142,23 @@ class Window:
             color: {Config.alt_hover_text_color};
         }}
 
-        QMessageBox {{
+        QDialog {{
             background-color: {Config.alt_background_color};
             color: {Config.alt_text_color};
             border: 1px solid {Config.alt_border_color};
         }}
 
-        QMessageBox QLabel {{
+        QDialog QLabel {{
             background-color: {Config.alt_background_color};
             color: {Config.alt_text_color};
         }}
 
-        QMessageBox QPushButton {{
+        QDialog QPushButton {{
             background-color: {Config.alt_background_color};
             color: {Config.alt_text_color};
         }}
 
-        QMessageBox QPushButton:hover {{
+        QDialog QPushButton:hover {{
             background-color: {Config.message_box_button_hover_background_color};
             color: {Config.message_box_button_hover_text_color};
         }}
@@ -179,6 +214,7 @@ class Window:
 
         root = QWidget()
         container = QHBoxLayout()
+
         btn_restart = QPushButton("Restart")
         btn_restart.setToolTip("Restart with a new set of ants")
         btn_restart.clicked.connect(Game.restart)
@@ -329,3 +365,12 @@ class Window:
         msg_box.setWindowTitle("Information")
         msg_box.setStandardButtons(QMessageBox.Ok)
         msg_box.exec()
+
+    @staticmethod
+    def prompt_combobox(message: str, options: list[str], defindex: int = 0) -> str:
+        dialog = ComboBoxDialog(message, options, defindex)
+
+        if dialog.exec() == QDialog.Accepted:
+            return dialog.get_selection()
+
+        return ""