It should be large enough to fit a sink and fixtures but not so deep you can t reach to the back.
Typical bar counter depth.
The top bar is around 18 to 24 deep and the bottom where the bartender works is usually 22 to 26 inches with a total depth of 28 to 38 inches.
This depth of a countertop with a breakfast bar will vary depending on the size of a breakfast bar.
The total height of a bar is 42 to 45 inches and 36.
There are a few factors that determine these standard depths.
The standard depth for a kitchen island without a breakfast bar is 27 inches deep.
Bar counter depth can range from 16 to 20 inches deep depending on your preference.
The standard depth of wet bar countertop takes a couple of factors into consideration.