diff --git a/poptimal.js b/poptimal.js
index 84bbae1..aefa4bc 100644
--- a/poptimal.js
+++ b/poptimal.js
@@ -18,7 +18,7 @@ import {ColourNamer} from './src/components/colour_namer.js';
 
 const CELL = 10;
 const MAG = 2;
-const WIDTH = 20;
+const WIDTH = 200;
 const HEIGHT = WIDTH;
 // number of pixels which have to be visible for a colour to be
 // mentioned in the alt text
@@ -36,10 +36,12 @@ function randomise_params() {
 		f: random.choice(RADIUS_OPTS),
 		r: random.float(0, 0.4),
 	}});
+	const cell = 5 + random.float() * random.float() * 55;
 	return {
 		background: palette[0],
 		palette: palette_name,
-		patterns: patterns
+		patterns: patterns,
+		cell: cell,
 	}
 }
 
@@ -134,18 +136,21 @@ function poptimal_svg(params) {
 	const document = window.document;
 	const container = d3.select(document.body).append("div");
 
-	const dm = new DotMaker(WIDTH);
+	const width = WIDTH / params.cell;
+	const height = WIDTH / params.cell;
+
+	const dm = new DotMaker(width, height);
 
 	const svg = container.append("svg")
-	  .attr("width", WIDTH * CELL * MAG)
-	  .attr("height", HEIGHT * CELL * MAG)
-	  .attr("viewBox", [ 0, 0, WIDTH, HEIGHT ]);
+	  .attr("width", WIDTH * MAG)
+	  .attr("height", HEIGHT * MAG)
+	  .attr("viewBox", [ 0, 0, width, height ]);
 
 	const background = svg.append("rect")
 	  .attr("x", 0)
 	  .attr("y", 0)
-	  .attr("width", WIDTH)
-	  .attr("height", WIDTH)
+	  .attr("width", width)
+	  .attr("height", height)
 	  .attr("fill", params.background);
 
 
diff --git a/src/components/dots.js b/src/components/dots.js
index b34cd15..3b061b3 100644
--- a/src/components/dots.js
+++ b/src/components/dots.js
@@ -45,7 +45,6 @@ function int_range(v1, v2) {
 
 class DotMaker {
 	constructor(width, height) {
-		console.log(width, height);
 		this.width = width;
 		this.height = height;
 		this.wh = 0.5 * (width + height);
diff --git a/src/index.md b/src/index.md
index 1dd835c..16add7a 100644
--- a/src/index.md
+++ b/src/index.md
@@ -144,8 +144,8 @@ const dots2 = dm.dots(1 / m2, n2, false);
 
 
 const svg = d3.create("svg")
-  .attr("width", width * cell * MAG)
-  .attr("height", height * cell * MAG)
+  .attr("width", WIDTH * MAG)
+  .attr("height", HEIGHT * MAG)
   .attr("viewBox", [ 0, 0, width, height ]);