diff --git a/dyesub-tool/src/main.rs b/dyesub-tool/src/main.rs
index 0a4c50d..adc69d7 100644
--- a/dyesub-tool/src/main.rs
+++ b/dyesub-tool/src/main.rs
@@ -8,6 +8,12 @@ use std::{fs::OpenOptions, io::Write};
 #[derive(Template)]
 #[template(path = "document.xml")]
 struct DocumentTemplate {
+    dimensions: DocumentDimensions,
+    box_size: SVGMeasure,
+    positions: Vec<(SVGMeasure, SVGMeasure)>,
+}
+
+struct DocumentDimensions {
     width: SVGMeasure,
     height: SVGMeasure,
 }
@@ -18,16 +24,35 @@ enum Error {
     Template(askama::Error),
 }
 
+fn positions(size: SVGMeasure, padding: SVGMeasure, dimensions: &DocumentDimensions, count: u32) -> Vec<(SVGMeasure, SVGMeasure)> {
+    let grid = size + padding;
+    let row_count = ((dimensions.width - padding * 2.0) / grid) as u32;
+    (0..count)
+        .map(|i| (
+            grid * (i % row_count).into() + padding,
+            grid * (i / row_count).into() + padding,
+        ))
+        .collect()
+}
+
 fn main() -> Result<(), Error> {
     let mut file = OpenOptions::new()
         .write(true)
         .truncate(true)
         .create(true)
         .open("output.svg")?;
-    let document = DocumentTemplate {
+    let dimensions = DocumentDimensions {
         width: SVGMeasure::new(8.5, SVGUnit::Inch),
         height: SVGMeasure::new(11.0, SVGUnit::Inch),
     };
+    let box_size = SVGMeasure::new(14.0, SVGUnit::Millimeter);
+    let boxes = 54;
+    let padding = SVGMeasure::new(5.0, SVGUnit::Millimeter);
+    let document = DocumentTemplate {
+        positions: positions(box_size, padding, &dimensions, boxes),
+        dimensions,
+        box_size,
+    };
     write!(file, "{}", document.render()?)?;
     Ok(())
 }
diff --git a/dyesub-tool/src/svg/measure.rs b/dyesub-tool/src/svg/measure.rs
index 3e23764..f9814e6 100644
--- a/dyesub-tool/src/svg/measure.rs
+++ b/dyesub-tool/src/svg/measure.rs
@@ -5,7 +5,7 @@ use std::num::ParseFloatError;
 use std::str::FromStr;
 use std::{
     fmt::Display,
-    ops::{Add, Div, Mul, Sub},
+    ops::{Add, Div, Mul, Sub, Rem},
 };
 use lazy_static::lazy_static;
 use regex::Regex;
@@ -118,6 +118,14 @@ impl Mul<f64> for SVGMeasure {
     }
 }
 
+impl Div for SVGMeasure {
+    type Output = f64;
+
+    fn div(self, other: Self) -> Self::Output {
+        self.measure / other.to_unit(self.unit).measure
+    }
+}
+
 impl Div<f64> for SVGMeasure {
     type Output = Self;
 
@@ -126,3 +134,12 @@ impl Div<f64> for SVGMeasure {
         self
     }
 }
+
+impl Rem for SVGMeasure {
+    type Output = Self;
+
+    fn rem(mut self, other: Self) -> Self::Output {
+        self.measure %= other.to_unit(self.unit).measure;
+        self
+    }
+}
diff --git a/dyesub-tool/src/svg/unit.rs b/dyesub-tool/src/svg/unit.rs
index 762a535..ddfe527 100644
--- a/dyesub-tool/src/svg/unit.rs
+++ b/dyesub-tool/src/svg/unit.rs
@@ -25,14 +25,14 @@ pub enum SVGUnit {
 }
 
 impl SVGUnit {
-    pub fn to_user_units(&self) -> f64 {
+    pub const fn to_user_units(&self) -> f64 {
         use SVGUnit::*;
         match self {
             Pixel => 1.0,
             Inch => 96.0,
             Centimeter => 37.795,
             Millimeter => 3.7795,
-            Point => 4.0 / 3.0, // 1.3333
+            Point => 1.3333,
             Pica => 16.0,
         }
     }
diff --git a/dyesub-tool/templates/document.xml b/dyesub-tool/templates/document.xml
index d555166..2f330cd 100644
--- a/dyesub-tool/templates/document.xml
+++ b/dyesub-tool/templates/document.xml
@@ -1,5 +1,8 @@
 <svg version="1.1"
-     width="{{ width }}" height="{{ height }}"
+     width="{{ dimensions.width }}" height="{{ dimensions.height }}"
      xmlns="http://www.w3.org/2000/svg">
   <rect width="100%" height="100%" fill="gray" />
+  {% for (x, y) in positions %}
+    <rect x="{{ x }}" y="{{ y }}" width="{{ box_size }}" height="{{ box_size }}" fill="white" />
+  {% endfor %}
 </svg>