Principles of Floral Design Proportion & Scale * Proportion refers to the size relationship between the elements, such as, the flowers, foliage, container and accessories in a design. * Scale refers to the size relationship between the overall finished floral design piece and its setting, for example, a table centerpiece for a wedding in relation to the size of the guest table or the overall venue space. Harmony & Unity * Harmony refers to the pleasing combination of materials, colors and textur