Four Elements Minimalist Wood Wall Art - 4 Elements Symbols Wall Decor - Fire, Water, Earth, Air Vector Sign - 4 Pieces Elegant Decor Gift The 4 elements are known as the building blocks of human and nature since ancient times. According to this theory, there can be no existence without these four elements. High quality 3 mm material wood. (black mdf) Wall Decor Dimensions: 20x20 cm (7.8x7.8 inch) (only the size of one wall decor) 30x30 cm (11.8x11.8 inch) 40x40 cm (15.7x15.7 inch) Free /Express Shipping Everywhere !! Double-sided tape will be sent to you in the package. You can hang the product on the wall with double-sided tape or nails. If you want different size or custom order please contact me.