diff --git a/render.c b/render.c
index bc054046..845bc0f1 100644
--- a/render.c
+++ b/render.c
@@ -24,6 +24,9 @@
 #define min(x, y) ((x) < (y) ? (x) : (y))
 #define max(x, y) ((x) > (y) ? (x) : (y))
 
+const int csd_border_size = 5;
+const int csd_title_size = 20;
+
 struct renderer {
     struct fdm *fdm;
     struct wayland *wayl;
diff --git a/wayland.h b/wayland.h
index 7de13850..243df207 100644
--- a/wayland.h
+++ b/wayland.h
@@ -82,6 +82,9 @@ struct wl_primary {
     uint32_t serial;
 };
 
+extern const int csd_border_size;
+extern const int csd_title_size;
+
 struct wayland;
 struct wl_window {
     struct terminal *term;