There is no minimum order required. However to take advantage of our discounted pricing structure, ordering a minimum of 100 bricks is best! Your minimum 100 brick order can be a combination of 4x8's and 8x8's. You may be offering 4x8's and 8x8's to your donors. For example, your 100 brick order can consist of (86) 4x8's and (14) 8x8's. We do receive and engrave orders less than 100 bricks as well. Please contact your customer service/sales representative to discuss further details and ask about our one time credit policy.