Shelving and how products are placed on shelving is an important consideration of retail design. It is recommended to put your best selling and most costly items at eye level.
For some of the products, you will receive special incentives from the product companies when you placed their products in certain shelves. You should also line up your products largest to smallest left to right, when there is more than one size of a product. This is because people naturally look from left to right.
By placing your bigger products on the left you are more likely to have customers take the bigger size, which makes you more sales. Vacant space should be reduced as it wastes precious space in your business and does not look good.
The space between shelves should just be a little more than is required for hands to take the product of the shelves. You should always ensure that your shelves are well stocked as this creates an impression of abundance and you will also lose sales if your shelves are empty.