Kilts are a very special item of clothing that have a status above and beyond other items like shirts and trousers. The reason for this is that first of all a kilt is something that for a long time has been used mostly for ceremonial and special occasions. While history suggests that kilts and highland wear were once used more as every day items of clothing, since finding their way back into the public psyche they have been used more commonly for weddings and Christenings.
That then means that many people are willing to spend a fair amount on getting a very nicely crafted kilt, and once that is going to last them a long time. At the same time though, a kilt Is often something that is a little more personal than a suit as it is something that you may well only have one of (whereas you have many suits that are all much of a muchness) and that may well carry special meaning for you if it was inherited or if you want to demonstrate your Scottish culture. While you can get cheap kilts, and this might mean that you own several types of kilt, you will still want to spend time and care choosing them and you will want to have at least one kilt that is reserved for 'best'. First of all then you need to choose the type of kilt you are going to wear and this means usually deciding on the reason you want the kilt and what you are going to largely use it for.
For the majority of people the kilts that will be most interesting will be the ones that are most associated with Scottish culture - those featuring tartan and worn with a Prince Charlie jacket and sporrans. Choosing these kinds of kilts means making sure that you pick ones that look the part and that feature tartan. The traditional Scottish kilt will be wrapped around the body around the waist (below the ribs but above the hips) and will hang to around the middle of the knees. It should be pleated around the back, but should be more plain round the front. The kilt will normally be wool, or more specifically 'twill woven worsted wool' with a weave of 2-2 type (this means that the weft thread will pass over and under two warp threats at a time - but you don't need to worry about that).
The tartan pattern can vary between kilts and some families have their own 'family tartans' which are unique to those in their family and which can sometimes be traced back as far as two centuries. This tartan is called a 'sett', and there are also tartans for individual counties, districts, corporations and more. If you can't choose the tartan you want for your kilt though, then there is no reason not to choose your own that you like and that matches your Prince Charlie jacket and sporrans.
It is important to ensure that your kilts are fitted and to look their best you should make sure to have them tailored or taken in, and to provide your measurements when you order them. You also need to ensure that you choose your Prince Charlie jacket, sporrans and other elements of Highland Dress equally carefully.