diff --git a/src/tools/render.rs b/src/tools/render.rs
index 4d8171e..25c7ca1 100644
--- a/src/tools/render.rs
+++ b/src/tools/render.rs
@@ -96,8 +96,8 @@ fn render<P: Position>(args: &RenderCli) where P: DeserializeOwned + ToSvg {
     let max_size = compute_max_size(&positions) + 10.0;
 
     let mut svg = svg::Document::new()
-        .set("width", max_size)
-        .set("height", max_size)
+        .set("width", args.image_size)
+        .set("height", args.image_size)
         .set("viewBox", format!("{} {} {} {}", -max_size, -max_size, max_size * 2.0, max_size * 2.0));
 
     svg.append(Rectangle::new()