diff --git a/inventory/templates/testing.html b/inventory/templates/testing.html
index 27592e7..f23ea05 100644
--- a/inventory/templates/testing.html
+++ b/inventory/templates/testing.html
@@ -24,6 +24,11 @@
     top: 10px;
     transform: translateX(-50%);
     z-index: 10000;
+    max-width: calc(100% - 20px);
+}
+
+#toolBar::-webkit-scrollbar {
+    height: 8px;
 }
 
 #coords {
@@ -43,7 +48,12 @@
 <div class="container">
     <div id="grid" class="position-relative overflow-hidden">
         <div id="toolBar"
-            class="btn-toolbar bg-light position-absolute border border-secondary-subtle rounded start-50 p-1">
+            class="btn-toolbar bg-light position-absolute border border-secondary-subtle rounded start-50 p-1 align-items-center flex-nowrap overflow-auto">
+            <div class="input-group input-group-sm w-auto">
+                <span class="input-group-text">Grid Size:</span>
+                <input type="number" min="1" value="{{ grid_size }}" name="gridSize" id="gridSize" class="form-control form-control-sm">
+            </div>
+            <div class="vr mx-1"></div>
             <input type="color" class="form-control form-control-sm form-control-color" id="color">
             <div class="vr mx-1"></div>
             <div class="btn-group">
@@ -188,6 +198,10 @@ const exportEl = document.getElementById('export');
 const gridEl = document.getElementById('grid');
 const importButtonEl = document.getElementById('importButton');
 const importEl = document.getElementById('import');
+const gridSizeEl = document.getElementById('gridSize');
+
+let gridSize = Number(gridSizeEl.value) || {{ grid_size }};
+let dotSize = Math.floor(Math.max(gridSize * 1.25, 32));
 
 let ctx;
 let dpr = 1;
@@ -214,8 +228,24 @@ window.addEventListener('resize', resizeAndSetupCanvas);
 
 setGrid();
 
+function applyGridSize(newSize) {
+    const n = Number(newSize);
+    if (!Number.isFinite(n) || n < 1) return;
+
+    gridSize = n;
+    document.documentElement.style.setProperty('--grid', `${gridSize}px`);
+
+    dotSize = Math.floor(Math.max(gridSize * 1.25, 32));
+
+    dotSVGEl.setAttribute('width', dotSize);
+    dotSVGEl.setAttribute('height', dotSize);
+
+    setGrid();
+    resizeAndSetupCanvas();
+}
+
 function pxToGrid(v) {
-    return v / {{ grid_size }};
+    return v / gridSize;
 }
 
 function getActiveTool() {
@@ -252,7 +282,7 @@ function snapToGrid(x, y) {
     const localX = clampedX - rect.left;
     const localY = clampedY - rect.top;
 
-    const grid = {{ grid_size }};
+    const grid = gridSize;
     const maxIx = Math.floor(rect.width / grid);
     const maxIy = Math.floor(rect.height / grid);
 
@@ -342,7 +372,7 @@ function redrawAll() {
 function drawShape(shape) {
     if (!ctx) return;
 
-    const toPx = (v) => v * {{ grid_size }};
+    const toPx = (v) => v * gridSize;
 
     ctx.save();
     ctx.strokeStyle = shape.color || '#000000';
@@ -411,11 +441,10 @@ function loadShapes() {
 function saveShapes() {
     try {
         localStorage.setItem('gridShapes', JSON.stringify(shapes));
-    } catch {}
+    } catch { }
 }
 
 function setGrid() {
-    const gridSize = {{ grid_size }};
     const type = getActiveType();
 
     gridEl.style.backgroundImage = "";
@@ -472,6 +501,9 @@ document.querySelectorAll('input[name="gridType"]').forEach(input => {
     });
 });
 
+gridSizeEl.addEventListener('input', () => applyGridSize(gridSizeEl.value));
+gridSizeEl.addEventListener('change', () => applyGridSize(gridSizeEl.value));
+
 importButtonEl.addEventListener('click', () => importEl.click());
 
 importEl.addEventListener('change', (e) => {
@@ -482,6 +514,12 @@ importEl.addEventListener('change', (e) => {
     reader.onload = () => {
         try {
             const data = JSON.parse(reader.result);
+
+            if (data.gridSize) {
+                gridSizeEl.value = data.gridSize;
+                applyGridSize(data.gridSize);
+            }
+
             const loadedShapes = Array.isArray(data) ? data : data.shapes;
             if (!Array.isArray(loadedShapes)) return;
 
@@ -498,10 +536,10 @@ importEl.addEventListener('change', (e) => {
 exportEl.addEventListener('click', () => {
     const payload = {
         version: 1,
-        gridSize: {{ grid_size }},
+        gridSize: gridSize,
         shapes
     };
-    const blob = new Blob([JSON.stringify(payload, null,2)], {type: 'application/json'});
+    const blob = new Blob([JSON.stringify(payload, null, 2)], { type: 'application/json' });
     const url = URL.createObjectURL(blob);
     const a = document.createElement('a');
     a.href = url;
@@ -543,13 +581,16 @@ document.addEventListener('keydown', (e) => {
 });
 
 gridEl.addEventListener('pointermove', (e) => {
+    // Note to certain minds that keep thinking we want to mix grid and pixel coordinates.
+    // No. No we do not. Pixels are not portable. Stop it.
+
     if (!ctx) return;
 
     const { ix, iy, x: snapX, y: snapY } = snapToGrid(e.clientX, e.clientY);
 
 
-    const renderX = snapX - {{ dot_size }} / 2;
-    const renderY = snapY - {{ dot_size }} / 2;
+    const renderX = snapX - dotSize / 2;
+    const renderY = snapY - dotSize / 2;
 
     coordsEl.classList.remove('d-none');