In products on Dolibarr if you chose dimensions unit like millimeter then the dimension is not converted correctly during the synchro with WooCommerce.
This still applies to the 14.0.3 version
Please take a look at the PR #104
In the latest version you have to fix the line 2805 in /class/data/woocommerce/eCommerceRemoteAccessWoocommerce.class.php
In products on Dolibarr if you chose dimensions unit like millimeter then the dimension is not converted correctly during the synchro with WooCommerce.