You mean size matters? Yep, even with your backyard putting green!
Seriously, size is a real consideration when you are planning to build your own
putting green.
The size golf green you want to build in your backyard and what your backyard will
actually allow can be a little disappointing if you are not realistic. If you have spent any time
looking at the web sites of putting green companies, then you have seen some very spectacular installations.
You can see plenty of great photos at the Residential Putting Green Magazine site.
Don't get visions of sugar plums dancing in your head until you have really taken the time to take a serious survey of your backyard and you can be honest about what size will work well for your putting green installation.
If you are prepared to spend big money to have contracting crews come in and reshape your lawn, then you can likely have about any size green that you can dream up, assuming your backyard is big enough. But for many DIY putting green projects, budget is an issue...so be realistic about what you need and can be happy with.
Spend some time in your backyard and think about what types of putting green shapes will fit without breaking your budget.
You can also check out a panel system that would save a great deal of the labor of the project. TourLinks makes a panel system. You can learn more about TourLinks and their panel system by reading a "before and after" look at a panel system being installed.