This 12-pack of See Spring Clear Stackable Storage Boxes drop from $54.99 to $39.99 to $29.99 when you click the on-site coupon to get an extra $10 off at Amazon. These are one of the best-selling storage and organization items at Amazon right now. Each shoebox-sized box measures 13''L×9''W×5.5" and have a lid design that allows the boxes to be locked together. Shipping is free with Prime or when you spend $35. Otherwise it adds $5.99.