With this plugin you can bulk edit simple or variable woocommerce products fields such as SKU, Stock, Regular Price, Sale Price, Weight, Height.
Demo http://codecanyon.net/item/woocommerce-bulk-edit-product-variations-prices/6822726
Downloadhttps://www.filecad.com/qz2s/Woocommerce-Bulk-Edit-Product-Variations-&-Prices-v2.7.rar