Perch Shop - Quantity option on product template

Hi guys,

I'm looking to add a quantity dropdown/number field on my product template, however I can't seem to get the field to show up.

Here's my current code:

<div class="product-detail">
  <div class="left-col"> 
    <img class="main-image" src="<perch:shop id="image" type="image" label="Main product image" order="4" />" alt="<perch:content id="alt" type="text" label="Image description" order="3" />" />
    <div class="thumb-holder">
        <perch:repeater id="product-thumbs" label="Product Thumbs">
            <img class="product-thumb" src="<perch:shop id="thumb" type="image" label="Product Thumb" />" alt="<perch:content id="thumb-alt" type="text" label="Product Thumb Alt" />"/>
        </perch:repeater>
    </div>
  </div>
  <!-- /div.left-col -->

  <div class="right-col">
    <h1><perch:shop id="title" type="text" label="Title" required="true" order="2" /></h1>
    <span><perch:shop id="sku" type="text" label="SKU" required="true" order="1" /></span>
    <span class="product-price"><perch:shop id="price" type="shop_currency_value" label="Price" divider-before="Pricing" size="m" min="0" step="any" /></span> 

    <!-- sale price -->
    <perch:if exists="on_sale">
        <div class="sale-price">
          <perch:shop id="sale_price" type="shop_currency_value" label="Price" size="m" min="0" step="any" />
          <p>Sale price! Usually
            <perch:shop id="price" type="shop_currency_value" label="Price" size="m" min="0" step="any" />
          </p>
        </div>
    </perch:if>
    <!-- /div.sale-price -->

    <p><perch:shop id="stock_level" type="number" label="Stock level" size="s" /> left in stock</p>


      <p>Quantity: <perch:input id="qty" value="1" type="number" min="0" placeholder="1"/></p>

    <!-- add to cart button -->
    <perch:form id="add_to_cart" app="perch_shop">
      <perch:input id="product" type="hidden" env-autofill="false" value="<perch:shop id="productID" type="hidden" env-autofill="false" />
      " />
      <perch:input type="submit" value="Add to cart" class="shop-btn" />
    </perch:form>


        <p><span class="delivery-information">Free delivery on all orders over £50</span></p>


    <perch:shop id="slug" type="slug" editable="true" indelible="true" label="Slug" for="title sku" order="10" divider-before="Meta data" suppress="true" />
    <p>
      <perch:shop id="description" type="textarea" label="Description" editor="markitup" order="3" markdown="true" size="s" />
    </p>
    <h3>Product Dimensions</h3>
    W<perch:shop id="width" type="number" label="Width" size="s" /> X H<perch:shop id="height" type="number" label="Height" size="s" /> X D<perch:shop id="depth" type="number" label="Depth" size="s" />
    <h3>Product Weight</h3>
    <perch:shop id="weight" type="number" label="Shipping weight" size="s" />KG
    <perch:shop id="status" type="shop_status" label="Status" suppress="true"/>
    <perch:categories id="category" set="products" label="Category" suppress="true">
      <perch:category id="catTitle" />
    </perch:categories>
  </div>
  <!-- /div.right-col -->

  <perch:shop id="catalog_only" type="shop_catalog_only" label="Catalog only" suppress="true" />
  <perch:shop id="trade_price" type="shop_currency_value" label="Trade price" size="m" min="0" step="any" runway="true" suppress="true" />
  <perch:shop id="on_sale" type="checkbox" value="1" label="Use sale price" suppress="true" />
  <perch:shop id="tax_group" type="shop_tax_group" label="Tax group" required="true" suppress="true" />
  <perch:shop id="stock_level" type="number" label="Stock level" size="s" suppress="true" />
  <perch:shop id="stock_location" type="shop_stock_location" label="Count stock" suppress="true" />
  <perch:shop id="max_in_cart" type="number" label="Max quantity in cart" size="s" suppress="true" />
  <perch:shop id="requires_shipping" type="shop_requires_shipping" label="Requires shipping" divider-before="Shipping" suppress="true" />
</div>
<!-- /div.product-detail -->


<perch:showall />

Any advice? Thanks!