Four inches faucets are ideal for small bathrooms. When you are choosing a faucet, you need to think about the size of the space and where you'd like to install it. For example, an eight-inch fixture might look too big on a pedestal sink. On the other hand, a four-inch faucet would be too small on a large sink or countertop. In addition, function and style should be your two main concerns in the selection process. There are many different styles and finishes available. You can select one that adds designer flair to the kitchen or an extremely functional faucet for a workspace.

One disadvantage of the 4-inch faucet is its rigid placement. It will only fit into holes that are perfectly measured, so it is best to measure carefully before installation. In addition, the faucet's width is restricted to the center of the sink and won't adapt to corner mounting. Despite these shortcomings, it remains a great choice if you want to save money. 

It is crucial to measure the faucet properly to ensure proper alignment. Single-piece faucets are easier to install, as the handles don't have to be aligned with the faucet body. Then, you'll need to connect the water lines and the drain assembly.