diff --git a/kitty/fast_data_types.pyi b/kitty/fast_data_types.pyi
index 97f45a577..d45eb54a1 100644
--- a/kitty/fast_data_types.pyi
+++ b/kitty/fast_data_types.pyi
@@ -1187,3 +1187,22 @@ def mouse_selection(os_window_id: int, tab_id: int, window_id: int, code: int, b
 
 def apply_options_update() -> None:
     pass
+
+
+def set_os_window_size(os_window_id: int, x: int, y: int) -> bool:
+    pass
+
+
+class OSWindowSize(TypedDict):
+    width: int
+    height: int
+    framebuffer_width: int
+    framebuffer_height: int
+    xscale: float
+    yscale: float
+    xdpi: float
+    ydpi: float
+
+
+def get_os_window_size(os_window_id: int) -> Optional[OSWindowSize]:
+    pass
diff --git a/kitty/glfw.c b/kitty/glfw.c
index 177c3693c..850584aa7 100644
--- a/kitty/glfw.c
+++ b/kitty/glfw.c
@@ -481,6 +481,16 @@ make_os_window_context_current(OSWindow *w) {
     }
 }
 
+void
+get_os_window_size(OSWindow *os_window, int *w, int *h, int *fw, int *fh) {
+    if (w && h) glfwGetWindowSize(os_window->handle, w, h);
+    if (fw && fh) glfwGetFramebufferSize(os_window->handle, fw, fh);
+}
+
+void
+set_os_window_size(OSWindow *os_window, int x, int y) {
+    glfwSetWindowSize(os_window->handle, x, y);
+}
 
 static inline void
 get_window_content_scale(GLFWwindow *w, float *xscale, float *yscale, double *xdpi, double *ydpi) {
@@ -508,6 +518,11 @@ get_window_dpi(GLFWwindow *w, double *x, double *y) {
     get_window_content_scale(w, &xscale, &yscale, x, y);
 }
 
+void
+get_os_window_content_scale(OSWindow *os_window, double *xdpi, double *ydpi, float *xscale, float *yscale) {
+    get_window_content_scale(os_window->handle, xscale, yscale, xdpi, ydpi);
+}
+
 static void
 set_os_window_dpi(OSWindow *w) {
     get_window_dpi(w->handle, &w->logical_dpi_x, &w->logical_dpi_y);
@@ -1253,7 +1268,6 @@ cocoa_window_id(PyObject UNUSED *self, PyObject *os_wid) {
     return NULL;
 #endif
 }
-
 static PyObject*
 get_primary_selection(PYNOARG) {
     if (glfwGetPrimarySelectionString) {
diff --git a/kitty/state.c b/kitty/state.c
index ba0d6e56c..794ffd98f 100644
--- a/kitty/state.c
+++ b/kitty/state.c
@@ -871,6 +871,34 @@ PYWRAP1(os_window_font_size) {
     return Py_BuildValue("d", 0.0);
 }
 
+PYWRAP1(set_os_window_size) {
+    id_type os_window_id;
+    int width, height;
+    PA("Kii", &os_window_id, &width, &height);
+    WITH_OS_WINDOW(os_window_id)
+        set_os_window_size(os_window, width, height);
+        Py_RETURN_TRUE;
+    END_WITH_OS_WINDOW
+    Py_RETURN_FALSE;
+}
+
+PYWRAP1(get_os_window_size) {
+    id_type os_window_id;
+    PA("K", &os_window_id);
+    WITH_OS_WINDOW(os_window_id)
+        double xdpi, ydpi;
+        float xscale, yscale;
+        int width, height, fw, fh;
+        get_os_window_size(os_window, &width, &height, &fw, &fh);
+        get_os_window_content_scale(os_window, &xdpi, &ydpi, &xscale, &yscale);
+        return Py_BuildValue("{si si si si sf sf sd sd}",
+            "width", width, "height", height, "framebuffer_width", fw, "framebuffer_height", fh,
+            "xscale", xscale, "yscale", yscale, "xdpi", xdpi, "ydpi", ydpi);
+    END_WITH_OS_WINDOW
+    Py_RETURN_NONE;
+}
+
+
 PYWRAP1(set_boss) {
     Py_CLEAR(global_state.boss);
     global_state.boss = args;
@@ -1066,6 +1094,8 @@ static PyMethodDef module_methods[] = {
     MW(global_font_size, METH_VARARGS),
     MW(set_background_image, METH_VARARGS),
     MW(os_window_font_size, METH_VARARGS),
+    MW(set_os_window_size, METH_VARARGS),
+    MW(get_os_window_size, METH_VARARGS),
     MW(set_boss, METH_O),
     MW(get_boss, METH_NOARGS),
     MW(apply_options_update, METH_NOARGS),
diff --git a/kitty/state.h b/kitty/state.h
index 698695cc2..0b9af1ebf 100644
--- a/kitty/state.h
+++ b/kitty/state.h
@@ -227,6 +227,9 @@ void gl_init(void);
 void remove_vao(ssize_t vao_idx);
 bool remove_os_window(id_type os_window_id);
 void make_os_window_context_current(OSWindow *w);
+void set_os_window_size(OSWindow *os_window, int x, int y);
+void get_os_window_size(OSWindow *os_window, int *w, int *h, int *fw, int *fh);
+void get_os_window_content_scale(OSWindow *os_window, double *xdpi, double *ydpi, float *xscale, float *yscale);
 void update_os_window_references(void);
 void mark_os_window_for_close(OSWindow* w, CloseRequest cr);
 void update_os_window_viewport(OSWindow *window, bool);