Many homes have a standard 4 inch tall backsplash in their kitchen and bathrooms.
Even if you are lucky enough to have a full height backsplash in your kitchen, your builder may have put a standard 4 inch tall backsplash in your bathroom.
Why is this backsplash so common?
It is very common because it uses so little material that makes it cheap, and it covers the edge between the countertop and wall to disguise a wall that is not straight and/or countertop that was not cut perfectly.
There is technically nothing wrong with a 4 inch backsplash, however it tends to be common place in mass produced mid to lower end homes, thus making homes that have them look less high end.
Fortunately, there are many other backsplash options that cost the same or only a little bit more, but give your kitchen or bathroom a custom and high end look.
Backsplash to the Bottom of Upper Cabinets or to the Ceiling
A better alternative to a standard 4 inch tall backsplash is to continue your backsplash all the way up to the ceiling, or the bottom of your upper cabinets, in order to give your kitchen or bathroom a more high end custom look.
Taller Than 4 Inches
If you do not want to run your backsplash to the ceiling, you can use a backsplash that is taller than 4 inches.
The taller backsplash will not cost much more money, but definitely show that you put extra thought into the design.
A 6 inch backsplash is nice, but might not be that noticeable. Opt for a backsplash that is at least 8 inches tall if you want your backsplash height to be obviously different.
Shorter Than 4 Inches
If you like having a short backsplash, consider using a 1 inch, 2 inch, or 3 inch backsplash instead of the standard 4 inch.
The shorter backsplash will make the backsplash nearly disappear yet still protect the wall at the back side of the countertop.
Chair Rail Height
If you are using a chair rail throughout your bathroom, you can install your backsplash at the same height as the chair rail to make the height look intentional.
General Tips
1) Do not put a partial backsplash on a side wall in a kitchen or bathroom because there is not a good place to stop it and it ends up looking weird. You do not need a "sidesplash", just a backsplash.
2) Instead of the traditional tile or stone backsplash, consider using more unconventional materials.
3) For a custom touch, add a detailed edge to your backsplash to make it extra special, but make sure to account for how your bathroom mirror might look adjacent to the top edge.