ewich

This plugin came out of a use-case of a shop owner running a hybrid online and brick-and-mortar store, needing greater 
control of restrictions on selling products online. Imagine a local customer calls in and asks you to set aside a copy of a 
new board game, and you want to make sure that they don’t all sell online. Or, you’re pushing a hot new release and want to deter 
scalping bots and/or wholesale buyers from buying more than a handful of a certain product per transaction.
Enter Restrict Stock for WooCommerce – a very small, simple, and lightweight plugin that gives greater control over how the stock of your 
products are displayed and interacted with in the checkout process. Upon installation, a new group of new fields 
will be added to the Product > Inventory interface for all products called “Quantity to restrict,” “Restriction Notes,” and “Quantity to Hide.” 
Please see below for more information on these fields, and how they influence product stock and customers’ user experience.
<pre><code>- **Quantity to Restrict:** If you wish to only allow a certain number of this product to be purchased per transaction, enter it here
- **Restriction Notes:** If you are restricting amounts of this product per transaction, you can enter a custom error message here for when customers attempt to purchase more
- **Quantity to Hide:** If you are reserving, or hiding, a certain number of product from being displayed in stock counts and being sold, enter that number here
</code></pre>

Restrict Stock for WooCommerce

A basic plugin that can enforce quantity limits for products in WooCommerce Orders.

taisho

Adds professionally looking “-” and “+” quantity increment buttons around product quantity field on WooCommerce pages. Removes default increment arrows inside this field. Easy customization through plugin settings.
<h4>Features</h4>
<ul>
<li>Adds “-” and “+” quantity buttons around product quantity field.</li>
<li>Removes default increment arrows inside the quantity input field, which are built-in by browsers.</li>
<li>Works on product, cart, checkout, shop, category or optionally all pages.</li>
<li>Quantity field with increment buttons can be added to shop page, category page or both.</li>
<li>Should look great on most of the themes out of the box. Extensively tested on Storefront theme.</li>
<li>Fully responsive design.</li>
<li>Plugin settings allow to customize buttons.</li>
<li>Generated with PHP – visible immediately on page load.</li>
<li>Buttons are not displayed for items sold individually.</li>
<li>Compatible with Quick View plugins.</li>
<li>For automatic cart and mini-cart update after changing the quantity on the cart page, you can use my other free plugin <a href="https://wordpress.org/plugins/ajax-cart-autoupdate-for-woocommerce/" rel="ugc">Ajax Cart AutoUpdate for WooCommerce</a>.</li>
</ul>

Qty Increment Buttons for WooCommerce

Adds professionally looking "-" and "+" quantity increment buttons around product quantity field on WooCommerce pages.

Restrict Stock for WooCommerce vs Qty Increment Buttons for WooCommerce