Hello @Set_ !

On the Pro plan, you can create up to 25 individual products from the Products section under the STORE tab.  On each product, you can create up to 5 options/variations.  Please keep in mind that every single combination of options constitutes its own option.  For example, if you have a product with 3 different sizes and 2 different colors, that's a total of 6 different options (3 x 2).  On the Business plan, you can create unlimited products and variations.

Best of luck to you and happy Weeblying!