Enitity 3: Shirt, White, XL Enitity 4: Shirt, White, X Shirt-White-X is the "SKU" as far as your database is concerned in EAV. You just recursively progress down all of the tree until all properties \ sub-properties are fully expressed. Keep in mind an "entity" is j...
Twin and full mattresses come in a longer XL version. Rather than buying a standard twin or full mattress, you can invest in an XL version of either mattress, which keeps the same width as a standard mattress but adds 5 inches (13 cm) to the length. A twin XL mattress is 38 inches...