How do I show products in a selected order?

Hi! I need to do the following:

I have custom post types for products. And I would like to be able to display the products of a specific category in the order I select via dashboard. On the product registration custom fields I would add a text field or a select box where the admin can choose numbers from 0 to 100 while registering that product. So if the admin choose that product to be number 100 it will be the last on the list and if choose number 0 it will be the first. How can I write the loop to achieve that displaying options? Thanks!