Hummingbird feeders come in all sizes. Many people who are new hummingbird enthusiast will choose the biggest hummingbird feeder they can find. While I can understand your desire to provide plenty of nectar for the hummingbirds find in your area, here is why choosing the largest hummingbird feeder that is available when you are first starting out is a common mistake.
When you are a new hummingbird enthusiast, I would suggest that you start out by selecting a hummingbird feeder with a smaller nectar reservoir, perhaps 8 ounces or so. This will help ensure that the nectar in the feeder will be far less likely to spoil before the hummingbirds are able to discover the location of your feeder.
Also having only the one small feeder will allow you to determine if there are a lot of hummingbirds in your area. You can always add additional feeders later if the hummingbird population in your area is large and you see that one dominate hummingbird is trying to monopolize the one feeder. You can place multiple feeders around your yard that are out of view of one another.
If you are a new hummingbird enthusiast and therefore just trying to start drawing hummingbirds to your yard, I would suggest that you start with a smaller size hummingbird feeder. As the number of birds that visits your yard increases along with your knowledge and love of hummingbirds, you can eventually increase the size of your hummingbird feeder and even the number of them that you place throughout your yard.