These are generally a few of the considerations when deciding on a tent.
Size of the tent
Type of use
The conditions in which you intend to use it
What design and style of tent
When deciding on your tent you will need to consider comfort and safety. At all times select a tent that will deal with the worst possible conditions that you think you could come across.
Obviously you need to choose the size of the tent. Typically the number of people a tent can sleep is the way tents are measured. As a result it could be reasonable to consider that a 4 person tent is suitable for 4 people. That would be the maximum number of people, and usually it is a pretty tight fit. Something akin to sardines inside a can.
Frequently people today will buy a four man tent to be used by two people. This will enable adequate room to place his or her gear within the tent, and still have the ability to move slightly. Obviously if you are an alpine climber, space and also weight is going to be important, so the smaller the tent the more suitable. But if the tent is going to travel in the back of your pickup, get hold of something you will be comfy in.
Tents are generally rated as 3 and 4 season tents. If you are intending to use the tent in spring, summer and fall, then a 3 season tent should be OK. If you're planning on doing a bit of camping in the winter months, then you will need a 4 season tent. Most of these might be a bit more expensive, however they will be stronger. They will use a more durable fabric coating, and probably additional poles.
Tents usually fall into 2 categories - Domes and also Tunnels. Domes are freestanding tents that do not need to be secured down to be able to stand up. Nonetheless it is generally in your best interest to stake the tent down. The majority of 4 season tents tend to be made in this way as they are stronger, and possess a curved surface where no snow can collect. The tunnel tents are a modified style of the dome, and require less fabric and usually use fewer posts.
Your decision on which 4 man tent is best for you won't be straightforward because of the variety of brands as well as designs out there. These points should make your job slightly easier.