There is the obligatory "that depends" but to try to be helpfull: For the average candle and soap website that does not have its own ordering system, no forum, and does not capture and store customer information, that should be enough. With the previous restrictions the bulk of the disk space will be product images. The bandwith in the above case is mainly going to be the images people view. So the deciding factors are how many images on the site, how many people visiting per month, and how many pages each person looks at on the site -- very hard to predict.