Which one fits
Yanet is a strong pure product-label designer for Shopify. The free plan covers a small store, the design modes need no code, staff printing can be restricted with user permissions on the Ultimate plan, and Stocky purchase orders print straight to labels.
Printout Designer fits when labels are part of fulfilment rather than stocktaking. Its plans count products and orders, not labels, so reprinting a sheet costs nothing extra. Labels can carry order data, the same editor makes invoices and packing slips, and documents print or email themselves when an order reaches a status you choose, on Shopify, BigCommerce, Ecwid or WooCommerce.