You can usually find 29-inch legs at your local lumberyard or home improvement outlet.
You can make the shelves yourself by rip-cutting wood from your local home improvement store or lumberyard, or buy pre-painted or pre-stained shelves.
Since the designer had the lumberyard cut the wood for her, she saved herself some time and hassle.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.