If you are a homeowner you are going to be looking for a modern product that attaches directly to your house: But, if you live in a rural area this is not adequate for you.
You need the heavy-duty rural version that has a metal post that is at least 4 feet tall to meet legislation requirements. You can also buy the best custom mailer boxes from various online sources.
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If you are an apartment or complex owner, you are looking for commercial products. You are going to be choosing between cluster box units which are generally 30-50 mailboxes on a metal post.
These are typically the type that you see in the new housing sub-divisions. Another option is the vertical product which is generally long and can receive larger parcels.
The most standard in apartment buildings is the horizontal version in which you can have the most mailboxes with the least amount of space.
The commercial mailboxes come in a variety of sizes and colors and can be ordered with custom sizes to fit a particular wall length and height. They can also be ordered as supply only or installed by experienced installers.
There are also a variety of different locks (you can have a key lock, pad lock, etc which ever you prefer) available that can be chosen by the owner, architect, or general contractor.
As you can see, there are several different mail boxes on the market and the version that you require depends solely on your use.
Personal mail boxes are standard and do not vary, however, the commercial products vary and can be custom made. Either way, you must have measurements ready and your use in mind to ensure you spend your money on the right product.